I think a lot of people, even those who used/use some variation of 1.x, are unaware of the emergence of some really good bundles. I'll post two links about the Sonata bundles:

http://www.chrisshennan.com/2012/02/16/symfony2-and-sonata-p...

http://sonata-project.org/bundles/

For those who don't know what a Symfony bundle is, you can think of them as an attempt to bring something like Rails Engines to the land of PHP.