I hate this. Why do I have to relogin to every app on a new phone? Why are some apps missing after every migration? Why do some apps just randomly lose all config and settings and force you to set them up again?
I want Google/Apple to force app devs to make backup and restore seamless. Like, if I am halfway through typing this comment on HN and then lightning fries my phone, when I restore to a new phone I want the exact same chrome tabs open with the same half-written comment. I don't want to have to battle to re-pair my printer or watch. I don't want stupid cookie warnings on every website again. I don't want to have to retrain every single fingerprint. I don't want to yet again opt out of data collection. I don't want to re-accept the same T&C's for photo backup I already agreed to last year, and the year before, and 10 years before that.
Please... just make migration work the way it should have always worked.
Google already does this optionally for Chrome synced data.