Simply making a version of X that loads on dialup is itself a market segment. Clone some popular websites but sacrafice everything.
Also I've long wanted an HTTP caching mechanism that permits cross origin caching, so people aren't redownloading the same dependencies. Essentially the server responds with a digest and if the browser has a match from any domain, it forgoes the download.
Is there a hard to trigger collision attack possible? Sure but I don't care.
