Azure, Github, CoPilot, .NET (why do you think it is cross-platform), Java (yes, MS is back in Java land, they were the ones with initial ARM support), Go (they have their own FIPS compliant distro), Python (although with layoffs maybe not anymore), Rust, npm, Powershell, Powerapps, 365 AddIns, Teams plugins, clang/cmake (part of Visual Studio installer), Azure Linux, Sphere OS,....
Because it opens the gate up to the rest of Microsoft tools.
Once you're gonna play with azure, GitHub, vsc, you're bit by bit invested in the ecosystem and opening the wallet for that other feature or integration.
FWIW I use it via Linux .deb and integrate with a private GitLab.