Yes, there are Tor relays. I just haven’t set mine up as an onion service.

I think we will see some form of file distribution microservice on Nostr protocol. Working on something in this space. Advantage would be tipping⚡️ the file note rather than the person who sent you a link and provable authorship of the file note. As the relays would be holding the files, precautions would be necessary to avoid DNS takedowns of illegal content.