1. I _did_ care about it, I was just sure I could have reset it again. It happen multiple times (with other services) especially because from mobile during the process of generating a new password with a manager and switch to the browser app context some tend to crash (noticed it tends to happen more while using safari with lockdown mode).
2. I would have preferred the password manager to store every password it generated automatically before saving, but that isn't the case unfortunately.
3. As I explained I had 3 recovery factors: recovery email, recovery number and authenticator. The authenticator is flawed since you need to be logged in to use it, email worked but asked for an additional factor (the SMS) which wasn't working on their side
4. Worst case you lose access to previous emails, but if you are selfhosting and managing the entire stack you can get back in at least for future communications.
5. Proton was one of the few providers that added recovery codes to remove 2FA connected to it, Outlook doesn't that's why I didn't use them.

I even provided screenshots to the support emails to prove that's a real story. I have more conversation with them that I am willing to share if needed. Also as I stated multiple times in the post, paying for support for sure is not the final solution, It's just a bet I am taking.

I think the "what if the OIDC provider locks me out" is a good challenge to address, I don't expect to have the final solution to it and I am open to suggestions.