I don't think that's a fair comparison; a lot of the so-called "improved Microsoft culture" is (1) the product of the growth of greenfield orgs and acquisitions

I don't think that's a fair comparison; a lot of the so-called "improved Microsoft culture" is (1) the product of the growth of greenfield orgs and acquisitions (Azure, Github, etc), and (2) a PR smokescreen. Microsoft still has a VERY substantial old guard.