backup is must
BUT it really depends on client server settings n options - user can CONTROL it. always use dummy npub to login be FAMILIAR first
your relay list is bound to get rugged if you use more than one nostr client. i highly recommend you occasionally back up your list. https://metadata.nostr.com/
Discussion
User can’t control it in this case
nostr:note1l7l9a24fklqe6gt4y2xj2fu3qnpnfmj55xc6edafdulasr54aqjsf4w9zx
User can - 1st time OPTION is shown
i don't think you understand the problem i'm talking about
once user save the "profile.json" properly 1st with set of relays + following aka contacts - it can uploaded and PUSHED to relays from only certain clients or some web tool. user need long learning curve most dnot have patience. most clients will accept what pushed from another signed by user. problem is certain client dnot give tool BUILT-in.