With the OP looking for a framework where he doesn't have to rewrite the code every few years (or more frequently, hello Drupal), major version upgrades matter.

With the OP looking for a framework where he doesn't have to rewrite the code every few years (or more frequently, hello Drupal), major version upgrades matter. I'm glad that transitioning your project from ZF1 to ZF2 was worth the effort and relatively easy. I have a number of clients still on symfony 1.4 because although unsupported and a 'dead' system, without a straightforward migration path to Symfony2 it doesn't make economic sense for them to do so - not when the whole web system (CMS, order management, the rest) is written using symfony 1.4 and Doctrine 1.2. Until it stops working, as it's going to be a new build either way. I think that kind of framework dead-ending is fairly irresponsible; certainly some of my clients thought I was irresponsible to have chosen Symfony when their 1-2 year old systems needed to be rewritten...