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?

ci4 is new so it's ecosystem is weaker than others. there is not much 3rd party plugins for ci4.

in symfony you can use 3 different ways to declare routes. in ci you should either set routes in php or let controllers do it auto.

however ci's approach is much more simplistic than symfony or laravel.

pro novice