Last I checked, Micro is too small and lacks crucial things you want for everyday development, and that is for a normal developer, not a language runtime-design

Last I checked, Micro is too small and lacks crucial things you want for everyday development, and that is for a normal developer, not a language runtime-designer. It was targeted mostly towards very low-specced hardware, closer to a Arduino than a Pi. I'm guessing things like F# relies on too much things which are not included here.