It’s not the async loop - it’s interfacing with the system. JS is designed to run in a sandbox and the only way out in say Node.js is to write C++ addons.
For example you don’t get to see TCP headers with Node out of the box and you can’t craft packets, whereas you can in Python.
For example you don’t get to see TCP headers with Node out of the box and you can’t craft packets, whereas you can in Python.