Intel Mac owners are currently facing the same problems PPC users have. Besides outdated browsers, OSX (pre-macOS) users have issues to get older peripherals working. My Nikon Coolscan V requires Rosetta, which was last distributed with Snow Leopard. My Fast Track Pro doesn't work properly (with all of its features) since Yosemite. Apple insists on changing the way drivers have to be made every OS version.
Intel Mac owners can always dual boot older and newer OS, and my older Macs (a unibody macbook 2009 and a macmini 2010) can run HighSierra, but in a couple of years AppStore will start blocking downloads for them.
And this introduces the last problem I have with Apple ecosystem: how can I download the last app version that is supported by Snow Leopard? I need to deal with unreliable software repositories on the web, that is, I'm pushed to not safe download practices, although I have bought licenses for using that stuff.
This behaviour also pushes users of older hardware to piracy, or perhaps to self-convince that Logic 9 is a kind of abandonware and could be freely downloaded.
In the iOS world, I have a highest spec iPad Mini 1 (64GB/Gsm) which runs iOS 9. I tried to download everything I could at AppStore, so those apps will be allowed to download in the future (hopefully). Otherwise, I'd be locked to software I already owned when Apple decided that iOS 9 was obsolete.
I also have subscriptions at iCloud and Apple Music... Apple should make more of this kind of money and leave our old Macs/iStuff alone.