i've supported home users for over two decades.
the 'average' of those is dumb as bricks when it comes to PCs or the internet. a mainstream linux distribution will not work for them unless their needs are basically a browser only--and for that limited use case, a chromebook is the better fit--dirt cheap to buy, and integrated with the google ecosystem they probably already got sucked-into via their android-based phone.
i have one user that calls me every year or so for an updated ubuntu live boot disk, they run a browser off that for everything--don't even have a hdd in their pc, and a couple others that boot a kiosk-type setup off hdd.
i do have a few that have a full linux desktop--but they aren't among those 'average' users and are mostly self-sufficient in maintaining them.