With how buggy their flagship OS has become, why would I trust anything else they release to be better? Or even if it does work well now, why should I expect it to stay that way? Microsoft has burned through all possible goodwill at this point, at least for me.
This isn't supposed to replace Windows, and it isn't a GUI desktop operating system at all. I doubt anyone working on this has anything to do with the modern Windows desktop UX.
UI of Windows is buggy and inconsistent. Kernel and low level stuff are actually very stable and good.
Windows is ultimately a lot more complex, and not open source. This also builds on the Linux ecosystem, so even if it comes from Microsoft, I imagine engineering culture is different from that on Windows and especially their online platforms (that's even worse than Windows if you ask me!).
I'm not defending MS in any capacity, but this library is open for viewing if you were so inclined.
Microsoft US a massive corporation with so many people, business units, departments.
A comment like yours is just like saying: "I know a buggy open-source software, why would I trust that other open-source project? The open-source community burned all possible goodwill".
MSR is a somewhat independent org; you should be making predictions based on other MSR projects
Microsoft doesn't have a very good track record with security or privacy. Maybe it works, but yeah you'll probably get screwed over at some point.
Still, the fact that it's open source is a good thing. People can now take that code and make something better (ripping out the AI for example) or just use bits and pieces for their own totally unrelated projects. I can't see that as anything but a win. I have no problem giving shitty companies credit where its due and they've done a good thing here.
Microsoft employ over 100,000 engineers. I'd advise against assuming that everything produced by any of them is bad because of bugs in Windows.