> We were so close to having literal plain Linux phones.

We had that and we still do. Back in 2008 I was wondering whether I should spend my first-earned money on the first Android phone (HTC Dream, aka T1) or a "plain Linux phone" (Neo Freerunner) and I've chosen the latter. Ultimately it was a good choice, as Android quickly turned out to be not what I wanted and only got worse over time, while the other path had me eventually go through Nokia N900 and Librem 5, and both of them worked well as mobile phones and pocket-sized computers. They feel like actual smartphones compared to Android and iOS which feel more like appliances that have largely replaced the so called feature-phones of the past.

That said, Nokia N9 was already strafing away from that path, with its Aegis framework that attempted to lock the device down in hopes to, basically, enforce a form of DRM. It turned out not to be very effective, but it would undoubtedly have kept being improved in later iterations, slowly eroding that unrestricted agency of the user that the N900 was famous for.