Why does windows keep changing to a new number? What's wrong with the way it was before? Windows 10 was fine, so were past versions. Like everything, things have to keep changing to be new when there was nothing wrong with it before.
Having worked for Microsoft, I can tell you that it has everything to do with business and revenue, with perhaps a little to do with technological advances (but not much).
These companies have built their business on continuously expanding their revenue. Once you've purchased something, if you keep using it, there's no more revenue. So they have to 'improve' things so you keep buying the next release (either under the guise of purchasing updates, maintenance or getting it outright).
They've tried different models, such as subscription services, but users don't like that. And I don't blame them.
You don't have to upgrade (and what a misnomer that is). If something works, keep using it until it doesn't work for you anymore. Unfortunately, developers of the applications you probably want to use target the new systems, so eventually you'll have to move.
Security updates are really the biggest concern in lagging behind the current releases, but most people, if they're careful, don't have to be all that worried. Unless you're paranoid, of course.
I used Windows XP long after it's supposed expiration, but eventually had to go to Windows 7. I just retired my last Windows 7 box for Windows 10, as I was having problems with some of the apps I was using.
There's really no point in railing against the tech companies. All you can do is to try and beat them at their own game for as long as possible.
@artisan-radio Well with computers if you want or need a new one and you don't want to get refurbished you have to get what Windows version it comes with. And even the refurbished ones have a newer Windows version installed by the refurbisher. I really care what version it comes with? It makes no difference as they all will do the exact same thing for me. Internet, Salamandra, functions, adjustments, settings are all the same. I turn on the computer and do the same thing no matter what version it has.