Is there a different way to fetch communities?

I miss the old days of reddit when r/all was just unfiltered and had a ton of stuff so I could naturally find subreddits without me having to go out of my way to search. I don't think this should become a github issue since it might be stupid and resource intensive, but is there a way to have instances do fetching without a specific user subbing to all of them?

Right now I am planning to just create a dummy account on my instance and having that just sub to everything I can find so my real account can just flip from subscribed to all when I want to see unfiltered content.