[fleitz]

'What I'm talking about is focused on web applications, and from empirical data, it seems that most web servers handle very few concurrent requests, therefore it would be silly to go all async to avoid threads.'

It might be an idea to look at this 'empirical' data and figure out which webservers use forking/threads and which use events/async, then you may realize why the high concurrency webservers took the 'silly' route of avoiding threads.