maybe at a certain point subjects will stop spending money to enrich the king and will pick something where they at least can install whatever they want
The overwhelming majority of users couldn't care less about this stuff as long as their phones play the content that they and their peers are into right now. If the alternative works well, is easy to switch to and is affordable then maybe they can be persuaded by their more tech savvy friends but if any of those three are compromised then you won't get much adoption.