When are we moving to atomic follows...?
Discussion
You mean 2000 events for 2000 follows? I don't think that is efficient.
On the scale of events, think about how many events are created for each unique reaction. Would be orders of magnitude larger than for follow connections. I think a hybrid approach could be tenable where you have a list of all follows to it makes it easy for clients to display follow counts, but the ultimate source of truth are the atomic follows so a client bug can't rug you of all of your contacts.
I think clients will improve and key management will also improve. Browser extensions could detect when a replaceable event changes drastically and ask if that's ok for that kind or specifically handle kind3 or keep backups or ... there is a million possibilities but making the list of follows 5 times heavier is probably the worst approach.