Do you know anyone who works at MS? If so, you would probably know that they have plenty of employees who have been there 20+ years. There are many arms of their business that are steeped in the culture of the 90s: windows, office, etc.
Now, corporate culture can and does change. But, we generally want evidence of change to be proportionate to the original problem/wrong committed. What has MS done that is more remarkable than any other major tech corporation, at this point?
Additionally, what reason do I have to trust them? If I were looking to host my website on a cloud provider, I may look at azure. But people act like MS making a change means we should all start using Windows, writing in office, etc. Why? These are still, for me, substandard tools.
At the end of the day, I am looking for a real, substantial change. Release Office as GPL, then I will really be surprised. So far, they have just done a MS version of what the other players have done:
Typescript: Dart
Edge: Literally a clone of Chrome, which was literally a clone of WebKit, which was literally a clone of KHTML
VS Code: Atom