1. These are not mutually exclusive, not any more than DNS and IPv6 are. Your protocol should support MNS and Pkarr/Npubs ... One for throwaway accounts and one for stable identity. In fact Nostr already have Nip05 ... I just want to make that sovereign.
2. You touched on one of the two main problems my design needs to address. But it is actually the simplest of the two; you make it computationally expensive to create these Names, just enough so that a user can do it once with ease, but millions of bots break the bank, and you have trillion names so even millions of bots won't saturate it.
I will share the actual details once I have working prototype instead of just making promises.
