I'm surprised that the comments don't focus much on security patches.
Manufacturers are trying very hard to have built-in obsolescence:
https://www.theregister.co.uk/2018/05/31/dutch_court_says_sa...
Unless this fundamentally changes, most non-techy users will have to needlessly upgrade perfectly good devices, run insecure software or become much more savvy about which manufacturers are better in this regard.