Why is Code Igniter not recommended?

I have been checking out Code Igniter recently and it seems incredibly easy to get an idea going very quickly with little work.
I have primarily been learning Symfony and haven't looked at Code Igniter mainly because there seemed to be a mass consensus that something like Laravel/Symfony etc would be better but I decided to checkout it again and was pleased with the experience. Its simplicity is a real plus point for me.
What are the reasons that Code Igniter might not be recommended?