That is the standardization process. The W3C won't ratify a standard that does not have draft implementations in the wild.
Making it the default and making the fallback only reasonably accessible by installing an extension that will rewrite your links (that all send back to the alpha-using version), causing every browser that isn't Chrome to slow down to a crawl while you happily display a "Hey, did you know the web is faster with Chrome?" isn't working through the standardization process, it is weaponizing it to sabotage other browsers.