It's easy today to deploy persistently in multiple ways (couple flavors of FCGI, uwsgi, starman, hynotoad, twiggy) in nginx, apache, and others. I think that's where part of the misunderstandings are entering. I'm surprised to hear any developers deploy anything as on demand-compile-and-execute scripts. It's never desirable (in production at least) and the only reason it might be necessary would be a shared host or something that doesn't support the application server you need.