[SkiFire13]

That only solves the OS side of things, but doesn't give you a good ecosystem. Unfortunately and increasingly bigger number of apps rely on Google services and attestations, meaning you need a Google approved software to run them.

[keyringlight]

I wonder if it'll promote having multiple devices, fragmenting into multiple ecosystems. One for the approved walled garden, another for uses that can exist without relying on those services (anything that doesn't need payments?).

Another approach I wonder about is single task specific hardware, like a GPS unit or media player, what tasks have developed over the past ~18 years within the mobile ecosystem and are mature and not rapidly evolving enough that they can be unbundled to their own devices, and desirable enough to stand alone that there's a market for it.

[fendy3002]

that's highly inconvenient, most people won't bother with that. The ~1% though will certainly do that, with black market apps and jailbroken OS will rise.