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But then you need to support 1.0, 1.1, 2.0 and 3.0. I'd rather wait a bit to avoid need to support yet another version. I can bet every new version of HTTP will cost millions of dollars across the industry. It is not agile where you just drop in a new increment. This is the base everybody need to support then and you won't be able to stop support in foreseeable future.

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> I can bet every new version of HTTP will cost millions of dollars across the industry.

That would be a fairly easy bet, but I doubt anybody would take the other side. My own estimate at rolling out a major HTTP protocol revision across the industry would be in the 100's of millions. Take into account that we have approximately 750 million web sites and 3 billion clients.

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