Others in this thread have covered most of the points already, but it is mainly software support for certain key things I want to do using my phone, such as online banking.
I realise most of this is just anxiety about taking the plunge and seeing what it’s like, so if I have money to burn I might just buy a second phone just to see if it’s a viable option for me.
But yeah, I wish mobile Linux was popular enough for there to be support from key service providers. Though it might be a long shot since “desktop” Linux is still growing and we haven’t yet seen the support shift.
I think it depends on the adoption of Linux on the desktop. When more people get a taste of what freedom of software brings, they are going to want that for their phones as well.
That or we might just be years away from the next big thing where everyone walks around with AR glasses and the cycle starts all over again with companies competing for a duopoly, and we’re just fucked.