I don't know what feeds are. But Dan mostly wanted to know what posts don't get deleted. So it's another key difference between tags and communities
I reckon feeds sort of makes groups somewhat redundant, maybe? And I assume Damus will introduce feeds at some point (I'm guessing they don't currently have feeds, not sure)
nostr:npub1xtscya34g58tk0z605fvr788k263gsu6cy9x0mhnm87echrgufzsevkk5s ?
Discussion
Feeds are a newish thing, maybe only coracle uses them atm. They work the same as bluesky feeds, basically different filters eg filtering to only show posts about Gardening would be a Gardening Feed:)
I'm not sure about post deletions 🤔
All apps will end up as half assed browsers. Wasted effort.