Castr.me is the most eye-opening app on Nostr so far for me (thanks nostr:npub1dergggklka99wwrs92yz8wdjs952h2ux2ha2ed598ngwu9w7a6fsh9xzpc for blowing my mind)
I think the perfect compliment would be a site that takes a hash in a URL and fetches the requisite file from one of many blossom servers that mirrors it
Then files linked to in a Nostr note won’t break if the hosting provider removes them
Moar decentralization