Hm. This is this and that is that. It is perfectly possible to write a stateless service hosted in a stateful process. In fact, the popular PHP-FPM way to host

Hm. This is this and that is that. It is perfectly possible to write a stateless service hosted in a stateful process. In fact, the popular PHP-FPM way to host PHP does just that. If you want to take it to the extreme, there's always CGI, of course.