Is there any evidence that MS's recent OSS efforts are a reflection of anything other than the fact that Ballmer, who was ideologically against OSS, has left an

Is there any evidence that MS's recent OSS efforts are a reflection of anything other than the fact that Ballmer, who was ideologically against OSS, has left and so now MS can act rationally and use the OSS community the same way many other large companies do? If working with the OSS community is in their own immediate self interest -- and I'm curious whether someone can point out something they've done that isn't -- I don't know how much light it sheds on an area such as OEMs where their self interest is best served by locking linux out.