Chrome also already has a feature for searching Drive files from the search bar[0], so it makes sense for MS to be on a level playing field.
0: https://9to5google.com/2019/12/02/chrome-google-drive-search...
0: https://9to5google.com/2019/12/02/chrome-google-drive-search...
If Microsoft was adding Bing as a search provider this wouldn't be nearly as controversial. Instead they're removing the user's preference and replacing it with their own, without consent, during a regular update of an unrelated product.
It is basically adware behaviour. Microsoft's self-rationalisation isn't relevant.
The issue here is that the install is not optional when it should be: admins should have the choice. But IMO it's debatable whether end users (of their corporate machines) should.
Microsoft's is Edge.
It's vaguely reminiscent of browsers in the early 2000s, it just needs Gator.