It's interesting to me as well as an ex-microsofter who worked on surface devices. Leadership (at least below the VP level) knew they were getting killed by Chromebooks and tried a few times to get a low cost device (Surface Go 1/2 for example) that ran a slimmed down version of windows (Windows S?). It tries to be more like chrome OS (hard to mess up, easy to flatten and restore a fresh OS on) but kind of just throws away the things you would pick windows for in the first place (legacy app compatibility) to be not bad at the thing Chromebooks are good at.

That said, I don't believe the Chromebook lock-in. It's just chrome and the web, which you can get on literally almost every laptop/pc sold today. Should Microsoft be concerned that you don't need windows as more and more things move onto the web? Absolutely. They should be doubling down hard on the gaming ecosystem (which atm still requires windows for certain games) as their hold is eroding week by week.