It's about 'skin in the game' and dog-fooding. If Microsoft is serious about Rust, they will use it internally and support it officially.
It's easy to give an opinion on Twitter about how everyone should use Rust and stop using C / C++ for new projects.
Officially supporting Rust in your enterprise software development tools and SDKs shows that you are serious and committed to what you say.
It's about 'skin in the game' and dog-fooding. If Microsoft is serious about Rust, they will use it internally and support it officially.
It's easy to give an opinion on Twitter about how everyone should use Rust and stop using C / C++ for new projects.
Officially supporting Rust in your enterprise software development tools and SDKs shows that you are serious and committed to what you say.