Wish browsers had built in support for it. Imagine if by default most downloads were through BitTorrent, and your browser would then seed the file for 1.5x the download size and time.
That is one of the main points. Some files are shared by thousands users and can be downloaded in seconds, but others are much harder to find, so that I like to keep the client on to help other people getting it quickly. I usually am annoyed when a file with a single seed reaches like 97% then it dies until the following day because the seeder had to turn off the PC, so I try to avoid this, especially since it costs me nothing as broadband is flat and the client runs on a machine that is always on.
EDIT: closes their browser is a bad way to phrase it. The problem is that the fact that they are seeding would be more in their face instead of hidden away in a notification icon on hover.
I wonder if intellectually "property" groups thought of this playing out.
a person i know (totally not me) only seeds the rarer things. for more popular stuff they only seed for a couple of days.
All things which your home gateway should have in one form, or another, where you designate torrenting a priority which doesn't interfere with the rest of your activities. And adapting dynamically. No need to think about how to slice available bandwith into pieces beforehand.
At the end of the day the bottleneck isn't at the protocol level, but the asymmetry of home cable connections. Torrents are great when you have symmetric fiber, but very few homes do right now.