... you mean, like flagship commercial phones already do? Because, no, it's no the case that iPhones basebands have unfettered access to everything: the iPhone baseband is a USB peripheral.
And the iPhone is one of the few phones that do this.
The main selling point of the Librem5 however is that it is not a restricted platform like iOS is, baseband separation is just a nice bonus, (plus hw kill switches).
