Async filesystem I/O isn't a priority for modern webapps / HTTP API endpoints that primarily just slam a database. That said, I somewhat agree wrt ASIO. I've n

Async filesystem I/O isn't a priority for modern webapps / HTTP API endpoints that primarily just slam a database. That said, I somewhat agree wrt ASIO. I've not quite been able to get ASIO to put out the reqs/sec, and the API is iffy in some areas, even when using C++14. Imho it's tolerable with the coroutine integration, but then debugging becomes a nightmare (forget exceptions because basically every socket operation can and will throw if the client does anything iffy)