> I'm utterly convinced that the only compelling reason for async is to avoid the per-thread stack memory allocation of 8MB per thread or whatever it is, in ord

> I'm utterly convinced that the only compelling reason for async is to avoid the per-thread stack memory allocation of 8MB per thread or whatever it is, in order to be able to scale to an extremely large number of concurrent threads/coroutines. If it's possible to avoid shared state then I tend to prefer threads, but in the presence of shared state there are good reasons to think that explicit coroutines are easier to reason about than threads or green-threads: https://glyph.twistedmatrix.com/2014/02/unyielding.html https://glyph.twistedmatrix.com/2014/02/unyielding.html