But just for copying files. Facebook does the same to deploy their 1GB compiled binary. What I'm asking about is: instead of only copying data, why can't we app

But just for copying files. Facebook does the same to deploy their 1GB compiled binary. What I'm asking about is: instead of only copying data, why can't we apply arbitrary functions to it? After all, the hard part is not applying the functions, it's schlepping the data - and that's the part BitTorrent solves.