At the same time, if anyone can make a language choice, it's him - the fact he didn't pick his own language is high praise for both himself and his neutrality, and the Go language.

Go compiler tooklit works very well on all the OSes. That would be a consideration.

So does the .NET compiler. That is not the issue.

Hejlsberg seemed quite negative when it came to cross platform AOT compiled C# in several comments he's made, hinting at problems with both performance and maturity on certain platforms.

Projects like this are needed to improve C#'s cross platform AOT. Missed opportunity IMO.

Sure, but this team's focus is on Typescript, not C# / cross-platform AOT; there's only so much time in a day. Others can pick it up I'm sure.

But I think it's also an indication that Typescript may be bigger and more important for Microsoft than C#/.NET is at this time. It's definitely much more used than C# is according to this non-representative survey of Stack Overflow (https://survey.stackoverflow.co/2024/technology).

Absolutely. Go is where it is because of the parent org's commitment to dogfooding it; strange that Microsoft is wasting this opportunity AND sending a negative message to .NET devs.