I'm very impressed with how Pylons embraces this philosophy of fragmenting all the pieces and using third-party components. (I've used many PHP MVC frameworks where *everything* is a monolithic bundle) I love that Pylons embrace an attitude of competition: * Models: SQLAlchemy, SQLObject, plain old DB-API * Templating: Mako, Genshi, Jinja, Kid, Cheetah, or whatever you like - using Buffet * AJAX: Rails-style WebHelpers based on Prototype, or Mochikit, jQuery, Dojo, Ext & more * Request Dispatching: Routes by default, or plug in your favorite

SO HERE'S MY QUESTION: Is there any other MVC, in any language, which divides their MVC into more unique/swap-able pieces than Pylons? I see the future of web-based apps based on these interchangable 3rd party components.

hopefully this makes sense to someone out there!