> Yeah, I know about that argument but it just doesn't make sense to me. Removing the GIL means that 1) you make your language runtime more complex and 2) you make your app more complex.

#2 need not be true; e.g., the approach proposed here is transparent to most Python code and even minimized impact on C extensions, still exposing the same GIL hook functions which C code would use in the same circumstances, though it has slightly different effect.