The async model is more complex than the thread model. NimGo just tries to looks like the thread model but inside it is async. We can view NimGo as an in-between !
For people which don't have much I/O, use mainly regular files, or relies on a high-performance async libraries like <https://github.com/guzba/mummy>, threads are certainly better suited ! I won't try to convince you pure async library are still important and vital for Nim. Still, there are many peoples who have or are trying to work on some kind of asyncio library (chronos, CPS, nim-skull's stackless coroutines, etc.). IMHO, there are limits actually with threads which make pure I/O library relevants, but maybe tomorrow it won't be the case. Still, I think you are right that people focus too much on async, when sometimes threads are a perfectly adapted solution (and often faster). If people tryes to combine Malebolgia with some async library, I'm sure it could lead to high performance server. For now, NimGo will stay single threaded but with the possibility to have one instance by thread, I think this is the simplest, more reliable and more performant solution. I won't try to feed again this conversation about thread Vs async, we have already say much and I don't want to appear too stubborn (unfortunately I am, but not enough competent to justify it ^^). I just think our use cases are different. But it was a pleasure to have this conversation with you, thanks for your time :-)