Also don’t underestimate the fact that OP has a new phone and is trying stuff out. The screen is usually one of the biggest power drainers in phones, so it could be that it just isn’t a fair comparison. I wouldn’t be surprised if the phone is just unlocked and awake more in the first few weeks compared to a phone you’ve been used to.
How do they currently solve this problem for passwords? You could just have the register/create account button lead to a pubkey upload instead of a ‘set password’, no?
For the first issue thats not realy true. To access the totp key you still need the actual device with the key, it’s only now split over multiple devices. Like having multiple bank cards for the same account.
For the seccond issue: Thats a good point, I have not found a good solution for that either, unfortunately
I use vaultwarden (selfhosted bitwarden), which stores both passwords and OTP keys on my own server, which I backup regulary. This allows acces to my OTP keys from any device, as long as it’s in my local network or connected to my VPN.
Must say I really like this solution. If one of my devices fail, I have a pretymuch seamless switch to any of my other devices, which are already configured anyways, since it’s also my passwordmanager.
If the server fails, my phone, pc and laptop all still have the keys cached, so I can use those untill I’ve restored a backup.
I have selfhosted my mail on my own domain, on a server in my closet, for about 4 years. In that time I never switched over realy important things, like government etc, out of fear of missing an email and not knowing. That was the only reason not to switch for me. I’ve had to move a few times in a short peroid and my career started taking more of my time, so I have less time to manage the server, thus I started looking around. Now I settled on proton, I don’t use any of their domains, only my own, and I’ve switched literally everything over, except for the recovery mail for my domain registrar login. Since proton hosts professionally, I trust them not to drop mails without telling me, and I don’t realy see a reason not to switch over. If I ever want to move provider, or start selfhosting again, I’ll setup the new provider, update the dns for my domain and done.
If you have some specific questions about my setup or choices, let me know, although I’m probably not able to reply in the next 12ish hours.