Someone with “a few” more followers nostr:npub1cj94enk44kn5mvrcma4sp7jnlsgnn4em7rk3dh3jt4fzyqs3m02s560efa asked this question and from that I learned the most common answer is Primal. Installed, signed in with nsec, and lo, all my stuff is here on Primal because Nostr is awesome like that.