How would my followers (or whatever they’re called in nostr) know where to get my events from?

It seems like optimal strategy is to send to/fetch from every relay possible. Effectively, every relay would host the whole network. In this regard federation seem a little more scalable.

Yes, this aspect seems problematic.

> to "follow" someone a user just instructs their client to query the relays it knows for posts from that public key.

> How would my followers (or whatever they’re called in nostr) know where to get my events from?

I don't know anything about Nostr, but couldn't that easily be solved by adding the relays that you use as a field in your event? Or even using a DHT to find relays that carry content from a particular user?

I don't know if clients support this yet but you can transmit a suggested relay with your post that people can add to their list of relays. That suggested relay should be one you control. That way they always have a point of truth for your notes.

I don’t think they do, but definitely looking forward to clients getting smarter about discovery and relay management.

This is a current problem. The solution is sending a small message telling everyone where you post to lots and lots of relays, then just posting to a few of them.