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piracy aside PopcornTime showed how powerful P2P can be for media distribution... some kind of sync application could've been it

Updaters/patchers for some popular games (Blizzard stuff, League of Legends, etc.) use P2P methods to reduce hosting requirements when pushing big updates to hundreds of thousands/millions of players.

I'm sure there's other use cases, but I'm not sure what they'd be.

Netflix and Facebook use P2P internally for large file distribution.

The big issue with P2P publicly is privacy. A lot of people don't want other people to know what they are doing.

Imagine for example youtube, or worse pornhub, using P2P.

yea Blizzard jumped on that train a while ago I'm sure it relieves them of so much load

I can't find the link right now but I believe blizzard disabled p2p over a year ago.

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