[TickleSteve]

yes... in ~25 years in the business, over ~10 companies.

..and I can tell you that precisely none of them performed a correct analysis of a systems concurrency needs before 'designing' it.

A common artifact of this is far too many tasks.

[srean]

I have seen egregious abuse of pre-emptive threads ... a lot. Abuse of green threads / fibres / coroutines ... not so much. I think one has to be a half decent programmer to be even aware those options.