This is a decision in all scripting languages. PHP solves concurrency very well - it just passes the problem to the web server. If you need multithreading to

This is a decision in all scripting languages. PHP solves concurrency very well - it just passes the problem to the web server. If you need multithreading to service a http request then you are either doing something wrong, or over-engineering the problem. Other language platforms also service requests in a single thread, including Node.