Being able to use a tool isn't the same as being able to transform a tool into a totally different type of tool. Someone shouldn't have to learn how to install and use linux just to use their 2014 laptop to browse the internet.
I understand that; I know many other people who wouldn't be able to deal with this. Just… my grandmother isn't one of them. (Sure, she isn't a “computer person” and doesn't really like the things, so she'd have trouble working it out on her own, but she's able to follow instructions and deal with the computer deviating slightly from how the instructions say it will react.)
I'm not criticising your point; just nitpicking your use of “grandma” as a signifier for the kind of person who can't deal with how garbage modern computers are. It's stereotypical, and only makes sense if you know those stereotypes; that's perpetuating stereotypes, and it also makes your writing inaccessible for people not familiar with the way your culture sees old women.
