to DSA or not to DSA

..by DSA I mean "Domain Specific Application". In my experience it is often better (though not necessary faster) to build an application from the group-up (using as many libraries as possible ofcoz) than using some product e.g. a CMS or portal product. The reason I guess is instead of trying to fit your app into some specific box, you rather build our own box using building blocks - to put it in another way, you write the system to match the customer requirements rather than trying to match the platform requirements.. it's that simple.. (I think)