I can't say the same for the smaller services.
I don't have any grandmothers still alive but would certainly suggest iCloud for all family members.
(But, FWIW, I copy down everything from iCloud annually and store on a portable 1TB drive to have my own cloud-backup.)
Yeah, back then Apples iCloud might have been the best suggestion.
If you are trying to extrapolate from the past - which is a good thing in general - do not go back ONLY 14 years from now, but try a bigger time span, too.
I was born in Germany. When I extrapolate from the past on ANYTHING, I at least always start in the year 1933.
No, not a good idea if you expect that within your lifespan some entity might be able to be forced to tell a regime where you are hiding right now.
Taking control of your own data is shitloads of work, I and understand people do not have time it, and have other priorities.
I am just making my point here on how to better extrapolate and project from the past towards the future.
That's not a physical law, but just the result of the current technological landscape.
As failure modes go, not great, but I'd say strictly less bad for the average user than losing photos you didn't plan to delete
Those corporations are part of the problem, not the solution.
Local, doesn't need encryption since there's no middle in E2E that you need protection against, and simple.
Grandma can setup ~/.zshrc `alias bak=cd ~/phonephotos && adb pull ...` to make it even simpler.