Not only is AoEII doing really well under Microsoft, it's doing so despite taking a couple of goes to get it right in the modern era. Most other companies would have given up when HD edition got a bit of a middling response.
I really wish they would update Rise of Nations, which MS also published. Obviously not as popular, but I loved the tech tree and the territory system.
I expect starcraft would be the same, maybe cant go back to it former glory but atleast it would be alive especially if make it to gamepass