It’s distributed by nature but it relies on a network of computers (peers) to always be available. And given the asymmetric speed of most consumer grade internet connections, most peers tend to be greedy and disconnect from the mesh after the download finishes.
This is where private torrent sites stepped in and encouraged sharing ratios. Of course, most of the “peers” ended up being dedicated servers with symmetric gigabit lines rented from some host in a foreign country.
So in the end it, the patterns shifted back to data centers and “dumb terminals”