This article with this title, these are not different versions of the platform, do meticulous, detailed, comparative performance run points. But these different versions of the platform, indeed our development, the program runs a very important correlation. And so on, as well as Win XP VS Win 7/iPhone 6 VS iPhone 8/G1840 VS G5500, etc ...... for developers, knowing the software version can be freely set.

I do not know the reason is ahead of, or changes to the master version of the software developers too fast? For example, I Chrome 2011 year of use, the then highest version is Chrome 7.0.517.5. 2018 In September 2009, I downloaded the latest version of Chrome is Chrome 68, now just over five months time, has come to Chrome 73. Cause major version changes too quickly, there may be reasons, users like the latest version of the demand, so developers competing to speed up changes to the master version, but the underlying kernel may not make substantial optimization to improve.

This new version of needs, like three years ago to become the latest version of the iPhone 6, and has quickly become the mainstream of the time, iPhone 4 Many young people already feel Nabuchushou.

With the old version of the software, hardware, seems to have an outdated, antique feel, so many people like purely chasing new, nothing more. However, many software and hardware development is not a person, a person can not determine the purpose of development. A lot of software, hardware, not the most optimized performance from the user's point of view the most useful, and many are considering business factors, not just domestic product, foreign software and hardware as well.

When you find this out, and could no longer chase the new, one version of the software, hardware, no need to update, it will become a timeless classic version, although this version has some shortcomings, but subsequent versions but more and more difficult to use, run more slowly, more and more bloated.

Therefore, the "upgrade" the word often misused. For example, China Telecom A Fuka (Hebei version), short listed in 2014, and soon out of print. 2017 again on the market, named "A Fuka upgrade", commonly known as "A Fuka two generations." Entitled "upgrade" of the package, the fees, and on behalf of the first function is basically the same, but get rid of several concessions, but in reality "downgrade version."

On PHP + NoSQL terms, Ubuntu 12 system, still is a timeless classic, are no longer upgrade within 20 years, since after the upgrade is almost entirely new system with less features (for independent developers, non-workplace applications) here is a comparison point 16 as the server after installation of new memory occupied by contrast Ubuntu 12 and Ubuntu.

Ubuntu is named for the year, such as Ubuntu 12 was issued in 2012, Ubuntu 16 is the 2016 release. Ubuntu 9 was issued in 2009 ...... and so on. Currently, the final version of Ubuntu is officially supported Ubuntu 12, the previous version has almost completely unusable, because these systems are network version, and earlier 11 Ubuntu can not use apt-get install the software. The actual can also be installed, you need to manually compile, but not apt-get automatically installed so convenient. There are also a lot of software does not support manually compile the installation, resulting in Ubuntu 11 hard to use.

The same situation also HTML 5. In addition to adding a lot of good HTML 5 features, remove an important center>, frameset>tag, this is not a good decision. Many HTML 4 and HTML 5 is not compatible.

CSS 3 was not the only HTML 5 support. In fact, HTML 4, even generic versions of HTML, the browser now a lot of support, to achieve rounded corners, shadows and other CSS effects. Whether the use of HTML 5, is not important, if not the words of the new features.

The same situation also occurred in Android phones. Android 4.2,4.3,4.4, for most people, is adequate. After the release, almost impossible to Root, as well as installation package file is too large, leading to brush machine can not succeed.

Andrews There are several excellent software very easy to use, such as: ES File Manager 3.2.4.1, Root Explorer2.21.1, System_app_remover_v3.5.1009 (unloader system safety program), these versions are very small, running smoothly, is 2013--2015 released in version.

Operating system, although now Win 7 share the largest proportion, Win XP is still the classic (XP SP version in 2008), for program development, there are many convenient place, although there are several XP operating system is not a new version now Humanize. But such systems XP, has unparalleled advantages, convenient space saving, reload.

Of course, it prompted us to update the environment, there is a reason that some new version of the software does not support the old environment. For example, many versions of computer software in the system, the phone is required, Firefox, use the highest version of XP, is Firefox 43, you must use the following versions of Win 7 and above versions.

Finally, go back to the core of the PHP platform you use. From the beginning 5.2.X, if less than new features, usually the older version, better use. I downloaded in early 2009 PHP 5.2.8 version of Windows, is the highest version of the December 2008 release, the archive 9.87M; now the highest version is PHP 7.3.2, x86 version of the archive is 22.63M.

PHP 7 Is there a comprehensive upgrade performance than PHP 5, after a time, when I re-test.

For professional and technical personnel, relatively more well-known old version, the new version of the pros and cons. Many of the original with a nice stable version, but just a few years out of the new version is not the original version easy to use. If you use the original version, in many non-technical view, it seem outdated. This time, with the installation of several new versions of old and new versions together, does not seem "outdated", or pretended to use the new version. In actual use their own version of what, no one knows.

Many older versions obviously a lot easier to use than the new version, do not need to chase new.