But you are not using P2P to exchange pictures or video with your friend or family. You store them in a big central server that somehow magically get paid for.

Wikipedia still begs yearly for hosting whereas if people voluntered their bandwidth and space there would be no problem hosting it.

I remember eDonkey fondly. The variety of things you can get with torrents pale in comparison of what was open to us: people would just share "their" files with a huge variety of different content. Nowadays you only get a few thousands of the most popular US movies.