Microsoft is basically the corporate version of the ship of Theseus at this point. The have a lot of questionable stuff in their history, but the leadership and the culture at large has shifted drastically since those days. At a certain point it is worth reevaluating one's opinions and question whether it is still worth hanging on to those old grudges.

I can certainly understand why people might be skeptical of GitHub being purchased by any of the big players in tech. But I don't see how Microsoft is really a worse buyer than any of the other potential bidders.