feels like there's also a fair amount of regular posters who have stopped being regular, and the irregular posters have stopped altogether. But also I'm looking at nostr less, and mostly on uk-time nostr, which may make it even quieter for me.

It's possible it could be good for nostr in the longterm, better to have a slow and quiet feed for the refresh it may need? out of the bitcointwitter2 reputation. Who knows