In my humble opinion, hosting instant messaging is something completely different than ActivityPub - due to the instant aspect of it.
With this, availability is a far more important aspect of it all. Hence the high available setup. Ofcourse, backups are just as important, but it shouldn't cause a full service outage in the unlikely event that one datacenter has a blackout.
You have given me your trust - and I want to do just by all of you. No matter whether you are messaging a family member about dinner or blowing the whistle about injustice.
At the moment in the upcoming two weeks when Exquisite.chat will be taking signups, I will be vocal about it. Thank you all - Exquisite has been such an awesome experience from the very start. And continues to be just that. 