[allendoerfer]

It seems to me, that the project chose LAMP to make it easy for everyone slightly technical to host an instance on a shared web server.

I am the first to criticize PHP, but I would never argue, that it is only good for prototyping. Of course you can use it in production. Also I do not see why you could prototype anything beyond a contact form faster in PHP than in another language, i certainly can not.

Flask has in no way integrated RBAC, you have to use plugins for that. I do not know Laravel very well but Google told me, that there are authentication plugins to implement role-based access, too, just like you would expect from any web framework that anyone has heard of.