It did't come to reality on the PC, but sneaked in through the backdoor with the advent of mobile devices.
I have little hope that this can be undone, but we need to be prepared to nip these tendencies in the bud for the next paradigm shift.
It is no accident that the laptops as desktop replacement are just as vertically integrated, most people not using laptops have NUCs and game consoles, and custom built PC towers are seldom seen outside hardcore PC gamers.
What is getting better are the likes of KDE. Where a good decade ago running Linux still was a pain where it didn't work, nowadays it mostly just works, the System UIs are more usable, more customizable and in many cases better than any of the commercial OS for a while now (and yes, that includes MacOS).
Android is a pain in the rear, IOS similarily so.
Of course they tried to provide alternatives, but they are still stuck 30 years behind, they haven't gotten to phones yet. During Covid they had issues getting videoconferences to work.
"but they are still stuck 30"
What did I say?
Huh? I've been happily using several GNU/Linux phones as my daily drivers for the past 16 years.
FSF also supported Replicant, which isn't something I'm personally interested in but it's there.
(There's the urban legend that you're always breaking some law even when you try your best not to; probably you're also always running some opaque firmware blob even when you try your best not to).
I don't see mobile users making any compromise like this, unless a gigantic scandal happens.