I had a similar worry for a similar reason, so created a Protonmail account basically to associate w/ my SN account so I could login that way if needed.  Protonmail requires nothing privacy-compromising, so that's something to consider.

elvismercury

What have ya'll learned since SN non-custodial transition?

What I haven't been able to learn yet is how to link new login methods to an existing account, or how to change one already added.

I'm using Phoenix on Android to login, but I've recently change phones and Phoenix in my new phone seems to have created a different LN node, so that I can't use it to login to SN.  When I try un-linking the old one and linking the new one, I get a different SN account, instead of linking my new Phoenix to my current SN account. The same happens when I try to link Nostr with the nos2x browser extension.

I must be missing something and not getting the right way to add new access systems to my account, and for the moment I've given up trying anymore (I don't want to add more and more accounts with any new try), but I'm afraid my old phone is gonna die soon (it's a bit old already) and I'm going to lose my access to SN.