Future Windows 10 builds to be served up based on quality, not frequency
Windows Insiders currently have a choice of three test rings -- Fast, Slow, and Release Preview. The Fast ring sees the most releases -- typically one new build a week -- and these tend to be the least stable. Slow ring flights come out much less often, and are more reliable and less buggy. Release Preview is for those who want early access to servicing updates on released versions of Windows 10.
That’s how it’s been for years, but now Microsoft is gearing up to make a big change that focuses on the quality angle of builds and better supports parallel coding efforts.