Regarding pseudonyms I also really like the point nostr:npub18dlusgmprudw46nracaldxe9hz4pdmrws8g6lsusy6qglcv5x48s0lh8x3 makes in https://untraceabledigitaldissident.com/nyms-personas-and-digital-identity/
"Have fun but don’t go crazy, know that on a long enough timeline this persona will be linked back to you. The more connections and data that you put out there the easier this will be."
A good switching tool would help firewall against one's own errors signing with the wrong key.