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I don't think they're coming out with HTTP/2 as another option vs HTTP, each with their separate pros and cons. I don't look at it as HTTP vs HTTPS, for example, but rather HTTP 2.0 - the next generation of HTTP. There may be short term, temporary issues as it rolls out. There may be hosts that take a while to get on board. But aside from that, I am hearing that it will seriously speed up load times as it will be able to load multiple elements at a time simultaneously, as well as an increase in security, which is much needed in today's day and age.