Here is the value proposition:
If you move to Nostr, you have the network effect of Nostr. Nostr is full of FOSS devs, and users writing wikis manuals and docs, so if enough of us move, then we can actually concentrate the effect and increase the interaction in each of our repos, since someone's npub will be a way to find their repo and interact with it, and the dev chatter will spill into Nostr... from Nostr.