For the record, I am of course doing async (Or rather non-blocking) I/O. I explicitly said that it's a mistake to write blocking code. (I made an error somewhere though where I wrote "non-blocking" instead of "blocking").

(And as I described, the "green threads" kind of blocking code is a mistake just as well. And the event-driven kind (i.e. callbacks / like in Javascript) leads to messes as well, only way I see it not become a mess is pushing stuff to buffers to process messages later in a separate message processing loop with some better context etc.