I don't see how Microsoft reinvented themselves. For better and worse, they behave the same way I grew to expect in the 00s with Ballmer. New CEO knocked off the Google founders' "nice guy" look, that's about it.
Meanwhile, Google is reinventing themselves... to be more like Microsoft.
Google has gone the other way: Page and Brin seemed to be well-liked outside of Google, as they were the visionaries who started it all. They made the choice to go with Pichai, who cares more about ad revenue than doing anything great. And Page and Brin, sadly, seem to be happy with their choice so far.