Microsoft pauses Windows 10 Insider preview builds for PC to prepare for Unified Update platform
@donasarkar Everyone asking about PC: we have a blocking bug that results in broken apps on an upgrade. We won’t leave you in that state.
— Dona Sarkar (@donasarkar) December 1, 2016
Currently it doesn’t look like that this was the real reason, because yesterday, Microsoft updated the blog post to state that the builds for Fast and slow ring are paused until further notice:
We are getting ready to start releasing PC builds to Insiders using UUP. To prepare for this, we are going to pause all PC builds for both the Fast and Slow rings starting this evening (Friday 12/2). We will begin flighting the latest builds via UUP starting with our internal rings first then to Insiders based on each ring’s promotion criteria. We’re excited to be able to release builds for PC to Insiders using UUP! Mobile builds are not impacted by this.
Microsoft is preparing to release Windows 10 PC builds using UUP, that reduces the size of the updates. This feature is already live in Mobile builds and PC is expected to cover up soon.