[octoberfranklin]

> The idea here is that rooms are abstracted from servers and sort-of exist ephemerally

No, that's not even remotely true. In fact the opposite is true. The domain name of the server used to create the room is perpetually and permanently embedded in the room name and can't be changed, ever.

[BrenBarn]

That doesn't have any practical effect, though. It's just part of the name and the room can still be used even if that server disappears forever.

[octoberfranklin]

No, not at all. Posession of a CA-signed TLS certificate for that domain, and the corresponding private key, is basically the root of trust for room operations.

[foresto]

I think their point is that the room doesn't depend on that server's continued availability.