Microsoft officials haven’t provided a public update on the company’s Windows 10X plans since they acknowledged in early May that they were switching gears by making it available first on single-screen devices. Internally, however, things are taking shape and the team is targeting spring 2021 for a first 10X commercial release, according to my sources.

Windows 10X, codenamed “Lite”/”Santorini,” is not a new operating system. It’s a Windows 10 variant in a more modular form and with a new, simpler interface. Originally, Microsoft planned to ship 10X first on new dual-screen devices such as the postponed Surface Neo.

I’m hearing Microsoft’s latest plan calls for 10X to debut on single-screen devices designed primarily for businesses (especially firstline workers) and education in the spring of 2021. And in the spring of 2022, Microsoft is aiming to roll out 10X for additional single screen and dual-screen devices, my contacts say.

The first release of 10X will not include support for running Win32 apps in containers, as originally planned, as Windows Central reported, and I am hearing, as well. Instead, it will be able to run Universal Windows Platform (UWP) and web apps only. Windows Central’s Zac Bowden believes that Microsoft might be counting on Microsoft’s new Cloud PC virtualization service which I reported on this week to provide those who need Win32 apps with access to them. My bet is Win32 container support won’t be there not just because of power/resource overhead, but because Microsoft has had problems with Win32 app performance on 10X. 

I’m hearing Microsoft hasn’t given up on running Win32 apps in containers on 10X, but likely not until 2022 at the earliest.

I asked Microsoft for comment and a spokesperson declined.

What’s going to happen with “regular” Windows 10 during all this? The spokesperson also declined to answer that question.

Microsoft may end up releasing just one feature update per year for Windows 10 starting in 2021 in order to free up more engineers to be able to focus on both Windows 10X and Windows 10 , I’m hearing from my sources. If that’s accurate, this would mean Microsoft will deliver Windows 10X releases in H1/spring seasons and new Windows 10 feature updates in H2/fall, moving forward. As I’ve reported previously, Microsoft is expected to bring some features it is building for Windows 10X, such as UX elements and possibly containerization and security technologies, over to regular Windows 10.

If this new once-a-year feature update schedule happens, here’s what we’d likely see: 

In fall 2020, Microsoft will roll out Windows 10 20H2, its very minor feature update, as expected. Microsoft has acknowledged that 20H2 will be a minor update to Windows 10 2004 and will be a very small and quick update for those running 2004. (Up until now, it looked like Microsoft was settling into a twice-yearly “major”/minor cadence rhythm for Windows 10 feature updates.) But then, in the spring of 2021, instead of rolling out a Windows 10 21H1 feature update, Microsoft will deliver its first 10X operating system release.

In the fall of 2021, my sources say, Microsoft will roll out a feature update for regular Windows 10 SKUs. This will be the 21H2 update if Microsoft sticks with its current nomenclature. And in the Spring of 2022, Microsoft will roll out an updated version of Windows 10X which will work on both single-screen and dual-screen devices, according to what I’m hearing about the company’s current plans.

Remember: All of these internal targets and possible schedule changes are always subject to change. But this is the internal plan at the moment, my contacts say.