It’s a bit puzzling because there’s Chinese companies like Retroid and AYN pumping out Snapdragon 8 Gen 2/3 handheld gaming devices that the community has ported Linux to, with working graphics acceleration and everything. I doubt these companies are using fully bespoke mainboards, because most of their components are borrowed from existing smartphones. Seems like some company could stick one of these Snapdragon boards into a phone chassis and have a reasonably compelling Linux phone.
There is no path from "I made a cellular phone" to "I can place calls" that doesn't involve tens of millions of dollars paid to the gatekeeping cellular carriers.
Without the equivalent of Carterfone for cellular, this will never change.
I have hope for the furiphone.
You should clarify what you mean by "can't keep up with" if you want to argue that.
My pinephone had user ownership but didn’t work well.
SXMo makes the interface unbelievably snappy, including playing videos, maps and more. You can find example videos on their website: https://sxmo.org/