I know what you mean, but I'm also specifically calling out the "percentage of homes with computers" and their respective technical literacy.
My friends and I, as kids, knew "everything" about computers and how to operate them, and there was this base level of knowledge that pretty much every computer-owning kid had.
I remember one friend figured out himself how to hex-edit his WarCraft 1 save files, this would have been at the age of 10 or 11, with zero instruction/guidance from parents or anything. I'd be impressed today if you found a singular kid in an entire high school who can hex-edit anything, let alone game saves, despite probably every single household of every student in that school having at least one personal computer, if not more.
Simultaneously, there's an important aspect that computers and the software for them are more abstract than ever, so "hex editing" is a pretty obscure thing for someone to have any reason to do.
Regardless, being able to save the currently-open Microsoft Word document to the USB stick one just inserted is pretty much the bare minimum of technical literacy I expect from anyone who has a computer at home -- yet this is apparently not the case. I'm talking like, even on a Mac, students couldn't figure it out.
My conclusion here is that, as many people lament, there was a spike in time where computer enthusiasm was a real thing, where a relatively high % of kids wanted to "know everything about computers", but now computers are normal and boring and most people see them as "thing to launch game/chat/web on", for better or for worse (and for a wide variety of reasons).