I really want IPFS to go mainstream. It solves a lot of problems with piracy and the internet in general. But people started thinking it was a blockchain thing, and I haven't heard much about it since then. Libgen uses it but that's the only place I've seen it be embraced.
File discoverability is poor, most people will not know how to act as a node and mirror files, and there's no builtin privacy protection in place and it's quite easy to figure out which IP addresses are hosting something.