If the make sideloading high-friction, either via account-bound or apk upload or permissions from MNO/ISP, I will leave android. I have a bunch of my own apps that only I use, not released to the public, if I cannot use them, I have zero reason to stay on android. I think one of the reasons they want to lockdown the system is to prevent guys like me from locking THEM out of my home/ecosystems, as and example, I build…
Why jump to another abuser when you could seriously start looking into alternatives? Ubuntu Touch has a really active community and it's very stable, you can even emulate android apps which you might absolutely need. I don't see Apple as the obvious next step; the obvious step, when one is pissed off with abuse of power is open source, not Apple.
As much as I want open source, I really don't think it's there yet for most people.