yes, lots of stuff needs to be figured out. Like, you don't need decentralized auth servers.

bittorrent has webseeds. I dump large files and archives on my sever, give people the magnet or link it from an article, they download it fromthere. If for any reason I no longer want to host the file I just remove it. Usually I just want the space back, in theory there could be bandwidth issues or an excess of interested participants. You can put fairly interesting websites in torrents too! That no uninvited participant can find them is a feature not a bug.

Email does html too! PDF is also great for publishing. You can send people videos and even executables if you are close enough.