It's not, and Symfony2, along with Laravel (which also uses Symfony2 components), is probably the only reason I would consider new PHP development these days.

Symfony2 is excellent and is growing in terms of usage, conferences, and so on. The framework actually borrows best practices from Django, Ruby, and Java. The false description of Symfony2 as "dying" makes me wonder how much the original author actually understands the landscape.

I don't think symfony is dying, however, bridging the two systems might produce a mess. but we better wait and see.

Maybe it was phrased that way because Symfony 1.x is dying, since Symfony 2.x is not backwards compatible.