I do use BitTorrent, but it’s never going to beat the convenience of just searching for a file and getting it when p2p networks first came out.
For niche stuff like 1930s movies sometimes I need to start a few torrents to make sure at least one of them has seeds.
I have had success with soulseek for music, but what do you guys use for other types of files?
Just on your niche stuff like 1930s movies, have you checked Internet Archive? I’ve been surprised at some of the stuff I’ve found.