We've been through this countless times and will be countless times more. 😀
XP isn't better designed than more modern versions of Windows. It isn't easier to use and isn't faster on newer hardware either. Heck, you'll be hard pressed to get a good deal of the really new hardware to even work properly on XP, in terms of drivers.
Like everything, it does some things objectively better, and others objectively worse, and the rest is just a whole bunch of subjective opinion by people who simply got so comfortable with XP before there were any compelling reasons to upgrade, that they consider everything else inferior, simply because it's not what they are used to.
However, as time goes by, more and more features are being deployed in newer versions of Windows, and more and more software is written to utilize existing features in newer versions of Windows, that XP is becoming more and more objectively inferior, at least to run on a modern/semi-modern PC. Just like 98SE/2000 did before. For legacy systems it can still be tremendously useful, again, just like older versions of Windows can be - which is something VOGONS users know a lot about.
The general rule of thumb I've been using, which seems to work well enough, is to always use the contemporary OS for the hardware in each system I have. At least this way you know it's likely been tested to work somewhat reliably together, and to complement one another's abilities. Thus, I have computers running Windows 98SE, XP, Vista, 7 and 8.1, and all work pretty well for what they are expected to do.
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