And then there are tons of details in working code that can't be "glossed over" and so figuring out what the point of the mock-up was from reading the code is often not an obvious step for me. So I probably wouldn't understand your discussion in the form of code any better than you understand me.

I'm sorry, but I simply do not believe that you can't demonstrate your magical "coroutines without cede points" in a few lines of code, without the need to post some humongous lump of proprietary code.

Which just leaves me thinking I know the real reason you'd rather write at length on distractions, than do so.