I'm familiar with most of the Flash vs. Flex comparisons out there and most of them present some version of "Flex is better for RIA's while Flash is better for design work".
Yet isn't it entirely possible to write elaborate RIA's using the URLLoader class + server side code? In this regard, I'm unclear as to what Flex offers aside from a set of handy user controls.
The reason I ask is that I'm starting a fairly complex Flash piece that needs to take a lot of round-trips to the DB. I'm hoping to avoid introducing a new framework into the equation but don't want to get bit by performance, scaling issues down the road.
Thanks.
T