imo, the 'grandparent' type user should really be on an ipad or chromebook etc. (unless they have some specific software needs). Too easy to get unwanted stuff running on windows and it needs admin.
Ever since I installed Linux for them, I don't have to drive every month to fix their system because they installed some malware on accident.
Twice amusing when they (usually) don't understand that the application they use has more moving parts than animated pictures on their phone.
I'm speaking more about more about my family and my desire not do sysadmin work.
Probably the same for an iPad or Chromebook.
I have done zero technical support for my parent's ipads for like 15 years now. They even got it working with a printer without me. The biggest issue has been bogus emails from "Microsoft Tech Support" and "Norton Antivirus", so the Windows ecosystem still seems grim that way.
Same general guesswork, but everyone on here can make reasonably educated guesses at what the AI evolution process will do to the tech landscape. Nobody knows enough yet to have anything in cement, but it's out there, and the small changes of the last few years make it seem that we are going to regress rather than improve the level of technical knowlege needed to be "average" when working on a computer.
There is always some app that every 'grandparent' type needs that only works on Windows.
What you are missing is it isn't always easy to teach a new operating system to someone with cognitive decline.
(And if we are picturing a grandparent without cognitive decline your suggestions makes even less sense.)
Anyway, their Windows laptop got all sorts of shit "side-loaded" (and I have a benign theory about this happened), and put them on iPad like 15 years ago. You can object to the closed system, but zero tech support calls for me.