What seems clear, however, is that Microsoft is prepared to increase the pace of the builds on the so-called Fast Ring: once every two weeks, maybe even weekly. There could eventually even be daily Windows 10 builds, though that's more theoretical than likely.
An endless series of builds also brings up the issue of cost structure. At Build, executives said on stage that Windows will be a free upgrade "for the first year" for Windows 7 and Windows 8 users, which implies you'll be paying for these features at some point. But Microsoft hasn't said how much, nor whether you'll receive some sort of credit for helping the company essentially test out its software. According to Belfiore, 3.7 million people are now registered as Insiders, testing out the builds.
But as Microsoft continues to roll out new Windows builds, it looks increasingly clear that it's not just "universal" Windows we're talking about. It's Windows forever.
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