One thing Microsoft does that Google does not is persistently push their garbage until it's actually not bad.
Blazr is relatively new compared to Microsoft's other libs but I'm sure in 5-10 years, it will be solid. It took .net core years before it became decent.
It has regular improvements and is LEAGES more well-design than JavaScript and I'd say Java.
Sure, it's no GO, but it is ever evolving.