It generally applies to eventloops, not just to lanugages with a builtin event loop. E.g. it certainly also applies to raw boost::asio which uses callbacks, lib

It generally applies to eventloops, not just to lanugages with a builtin event loop. E.g. it certainly also applies to raw boost::asio which uses callbacks, libuv, libevent, QT, GObject, Netty, etc.