[lloeki]

> lose the key and no one can get you back in to your account.

Incorrect: only Apple cannot.

You can voluntarily declare:

- recovery accounts: these trusted accounts can help you authenticate anytime.

https://support.apple.com/en-us/HT212513

- legacy contacts: these trusted contacts can access your account in the event of your death.

https://support.apple.com/en-us/102631

As for the "lose recovery key" situation is no different than hardware token 2FA + recovery codes. Print multiple copies and spread them to trusted third parties.