I know what you mean (nginx & co), but I wouldn't bet whether the majority of websites and APIs use a thread per connection or event-driven IO. E.g. there is ar

I know what you mean (nginx & co), but I wouldn't bet whether the majority of websites and APIs use a thread per connection or event-driven IO. E.g. there is are a lot of PHP sites out there, which are thread-per-connection. Or which are powered by Java servlets, which had been synchronous until quite recently.