In terms of lines of code, I'm sure that things like OMeta are pretty small, but that doesn't mean the implementation is not complicated. And I'm not that famil

In terms of lines of code, I'm sure that things like OMeta are pretty small, but that doesn't mean the implementation is not complicated. And I'm not that familiar with the *Meta stuff, but AFAIK that stuff is just the frontend, whereas on the backend (the logic for generating the machine code / bytecode) things can get messy and complicated. Also, I'm sure that the Go implementation is right now simple, but every mainstream compiler quickly evolves towards doing more and more AOT optimizations, like for performance or for better error messages. Again, performance optimizations can get really complicated and messy.