> setting up all the types for the channels based on the types in the functions being run by the go routines was quite difficult. I had to do it all by reflection and the code was really complicated.

My guess (and personal experience) is that this would maybe be more convenient to do this via code generation. It's not as ergonomic as generics (well, depending on the implementation...), but still it's less cumbersome and prone to failing at runtime that reflection.

Reflection has its uses and places, but as soon as it gets all over a function then it's time (imho) to look into code generation.