Renaud Chaput on Nostr: Yes this is very complex (and not specific to Mastodon, most if not all AP software ...

Yes this is very complex (and not specific to Mastodon, most if not all AP software suffer from it). We are very happy that a contributor offered to solve this, and are doing what we can to review their work and guide them so it is done with all the possible problems in mind.
We are still afraid that enabling this will create *a lot* of instance-to-instance trafic, but we will need to test it to see if it is too much.