This was inevitable and going towards the direction, but it is sad to see this part of CoreAI division. Copilot and other AI initiatives should not be the primary driver of GitHub's vision.
Github may have more value as the largest software training corpus in the world than as a paid VCS, and Microsoft gets to uniquely utilize that as they will have non rate limited internal APIs and/or dumps to train on.
I assume they already had those APIs - Github was already owned by Microsoft. By prioritizing AI feature over the core experience it's possible that Github stops being the largest software training corpus in the future.