Basically what @clivestaples already said. If you go to the Laravel Website [1] and look through "Ecosystem" in the navigation - that's what I am missing from Rails. And of course a more active community.
I'd say the Rails community has been a flat-line somewhat... but not diminished. Yes, it may not have been the hottest framework, but it's been rolling forward consistently and actively.
Edit: Hope to get an ecosystem similar to Laravel's with this!