I think, we should not read too much into it. He is honestly exploring how much this tool can help him to resolve trivial issues. Maybe he was asked to do so by some of his bosses, but unlikely to fear the tool replacing him in the near future.
https://www.theregister.com/2025/05/16/microsofts_axe_softwa...
Perhaps they were fired for failing to show enthusiasm for AI?
Half of Microsoft (especially server-side) still runs on dotnet. And there are no real contributors outside of microsoft. So it is a vital project.