I suspect the vast majority of chips made today are made at the 12nm process node or coarser, because I know of some surprising examples. Smaller process nodes are critical to the highest-performance digital chips, but a lot of chips aren't those.

Eh if humanity had to revert to 12nm nothing would noticeably get worse

Cellphones would, servers would, not much else.

I, personally, am not doing much with my phone i wasn't doing 10 years ago, which about lines up with a 16nm process. I think the camera is the only thing I'd really notice.

Well, and all the internet services you use via the phone going away. Not sure about 5G.

I don't really use much aside from apple music, which was buggy but was released almost exactly 10 years ago, and apple photos, which was already a thing. Google was already circling the drain, so I suppose that's a good point.

5G wasn't really that necessary, although I know it's critical as a broadband replacement for many people.

I would miss TikTok, of course.

What Andy (Grove, Intel cofounder) gives, Bill (Gates) takes away.