Per-user third-party media storage solution

Am I the only one wondering if self-hosted servers will get to keep files permanently when self-hosting is eventually available? I think it would be good if there was a role permission (ie server owner or admins can use) to ignore message expiration dates. So you can set up rules channels for example with images that do not need to be re-posted after a few years. Or even a channel type that isn't for typical messages. Like most servers will probably have a rules channel and those messages should not have to be re-posted. While most messages are fine to expire some need to be permanent.