And incremental compilation is more than virtually all the listed compilers can do. I think the issue is more that not many people are using those languages in

And incremental compilation is more than virtually all the listed compilers can do. I think the issue is more that not many people are using those languages in anger (except for Delphi I suppose, but Object Pascal is a comparatively simple language with no H-M inference that also does very little optimization). People don't hit the limitations.