Its way easier to make the switch. Cant imagine to move back and miss that much freedom of choice and possibilities that are offered with grapheneOS. Start with two phones makes it simple to compare and see the advantages. Be open and you find ways and solutions you didnt know there were there.
What about @Bitcoin Knots instead of core? Maybe a bit more of a fresh start for a decentralized software protocol. But nostr should be the way independent of the software