Can't say for the rest, but Symfony 2 was a resounding success. Current Symfony 5 is very similar to Symfony 2, with just a ton of refinements and facelifts.
The few symfony developers I know indeed loved symfony-2 very much. But migrating their projects from symfony-1 to symfony-2 was felt basically as a rewrite.
I guess the first attempt is always tricky, let's see if Go 2 can find a smooth upgrade path.