Man, passwords sure are nice aren't they! All you have to do is remember one because your password manager remembers all the rest of your randomly generated passwords for you and as long as you keep a backup of the password database you never have to worry about this bullshit.

OTP works with a password manager too. I have Authy on my Android, and Pass on my Linux computers. The second is backed up properly. This approach just means that enabling 2FA (which is mostly OTP in any case) just means registering the OTP URI in two locations instead of one.

Additional benefit: I can generate an OTP for any service protected like this without having to get my phone from wherever it is.