Windows 10 does what it set out to do: Bring the Windows 7-style interface into the tiled universe. It is, in many ways, what Windows 8 should've been. It has all the advancements from Windows 8 -- security, stability, power saving, and on and on -- with much of the Windows 7 interface fully integrated. Windows 10 makes the old-fashioned desktop an integral part of the product, instead of an accidental tag-along, as it was in Windows 8 and, to a lesser degree, Windows 8.1.
At some point -- sooner rather than later -- I figure most Windows 8/8.1 users will want to upgrade to Windows 10, although there may be some touch-sensitive types who won't like the new Tablet Mode.
For Windows 7 users, it may make more sense to hang tight for the foreseeable future -- or at least until Windows 10 Update 2 or 3 or 4 or 17 may be available. Sit back and watch the rollout unwind. It will take months for the major problems to surface and be corrected by Microsoft. It will take longer -- perhaps much longer -- for updates to make the promising new features attractive enough to warrant upgrading.
Eventually all Windows users will get Windows as a service. But there's no rush. Microsoft isn't going to run out of bits. Wait.
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