Comment by pjmlp

This is another good example that not all GCs are born alike, even though its is common to place them on the same basket.

WASM GC is a MVP, only usable by languages whose GC requirements overlap with JavaScript's GC.

Java has it easier than either Go or C#, because the Java and JVM specification is actually silent on how GC should be implemented, hence why there are so many implementations to chose from across JVMs.

Outside the browser there is hardly any value, just use JVM or CLR directly.