Scariest thing is Discord isn't accessible without an account. And it WILL close down within a decade. And with that all that information will be gone.
If you don't have an account, discord asks for a nickname, and you still can enter the server without register that account. I think they will create some kind of guest-account. And that access will disappear at some point, so you need a new invite for this server.
Yes. And the account also requires a phone number as often as not, and of course the agreement to their abusive TOS that is so restrictive that it even bans political cartoons.
Forums and plenty of other websites close down. They are not always archived or backed up. What is wrong with data being deleted after a service closes?
They _can_ be backed up by the internet archive and other interested parties, because they are accessed through web standard technology. Discord is closed. It's worse for your information.