Great post, Your Mother. Thanks.

Actually, it was me that mentioned your quoted keywords in response to a user suggesting I should modify my CMS to use RPC::Any::Server in order for it to act as a hub for the various mobile app clients.
I especially liked reading about what PSGI/Plack is.
Seeing this CMS is 100% object oriented, with most packages relying on package inheritance, making it Plack "harnessable" should not be too difficult. (famous last words)
This web CMS essentially only has a single point of entry with every web request going to its main handler, which in turn invokes the relevant CMS Perl Package to handle the GET or POST, then return its HTML as a string ref to the main handler.

Thanks for the homework
Cheers,
Konstantinos