I used to root my Android phones. Then I stopped because all banking apps were disallowing launch if your phone was detected as having root.
Rooting your phone and unlocking the bootloader are separate (and mostly independent) things. E.g., by default, LineageOS is not rooted, but it requires an unlocked bootloader to install. Now, rooting without an unlocked bootloader is harder.
For “official” Android products, maybe eventually.
In fact I can see a future where all computing/devices are locked down and become appliances, much like your tv or fridge.
You use them how you’re “meant to”. Sideloading? Programming? Tweaking? Why do you need to do that, are you a terrorist?
I hope we don’t get to that world, but for a while now I’ve been thinking it looks like a possible outcome.
a future where all computing/devices are locked down
And who would mandate and control such a requirement? And how would it be enforced? And why?
The only reason Apple is locked down as it is, is that Apple as the only manufacturer has absolute control over architecture, hardware and software.
Being open will always be a unique selling point by at least some competing companies, so there will continue to be some, absent a dictatorship rigorously controlling the manufacture and sale of such devices. But I think not even China has managed to accomplish that. Open devices are an absolute necessity if you want research and technological progress. And if the industry needs it, some of it will inevitably become available to citizens, too.
