> No, a single GPU can support virtualization and be shared among multiple visitors.
Do you really think I'm unaware of that? Have you tried it lately? Most (nearly all) consumer level hardware doesn't support it and (I might be wrong about this next bit but IIRC) you won't get full performance because most solutions partition the hardware rather than multiplexing it.
> This is by design as a "proper" backup violates Android's security model.
I'm aware. That doesn't address the problem.
> the high level functionality remains the same
Absolutely false. Apple at least built a solution that appears to perform as advertised even if I vehemently disagree with the underlying security model and believe that it is actively making society worse off in the long run. Google has failed miserably at that (at least last I checked, which was a few years ago TBF).
> and there is better security.
By whose definition? The officially sanctioned security model does not provide anything of value to me (from a technical perspective) relative to having full control over my device.
> What does this even mean?
It means that if someone else has control over the software on my device then outside of a truly unusual end-to-end code auditing arrangement I can never be confident that I'm not being watched.
> There is no fundamental reason for spyware to exist
What sort of drugs are you on over there? Ad tech is a massive industry. There are all manner of motivations to hoover up user data from market research to selling it to authoritarian tendencies.
> User freedom and security are orthogonal
Notice the quotes. By "insecure" I mean not provided by BigTech and system state attested by a whitelisted HSM.
> due to Turing completeness almost everything will support booting insecure operating systems.
Have you tried customizing the OS on a vendor bootloader locked mobile device lately?
> If there is no market demand for running applications on insecure platforms then perhaps that's an okay situation to be in.
Sophistry. It's user choice due to a combination of lack of awareness and understanding, a preference for convenience even when that's detrimental to society in the long term, and the resultant network effects.