Microsoft today posted an explanation on lack of new Windows 10 builds. They offered the Windows 10 build release cadence plan also.
The short answer on this is really that we’ve probably been too conservative about pushing builds to the Fast ring for Windows Insiders.
We’re having lots of discussions right now about how we should tune for this going forward, and have already made some changes in how we’re working. The reality is that faster builds to you will include more bugs, and so far we’ve erred on the side of stability. In the process though we’ve not had as much distinction between Fast and Slow. In our internal rings, our Canary ring probably sees 2X-3X as many builds as OSG because we catch problems in Canary and don’t push to OSG.