I mean realistically there's never been a good reason that phone OS's are as specific as they are. The driver situation is absurd. The most common highly integrated feature - the camera - doesn't even really run on the phone OS anymore since there's usually an image processor of some sort inline.

I have absolutely no problems with running a USB-C on the phone and component manufacturers to get their act together and figure out an open standard to support common components (i.e. basebands, cameras, audio routing, security chips) so hardware can be supported after release (which I would hope in practice would just be "in the Linux kernel tree").