You can ask yourself one question: Is there any chance you'll regret not having went on sooner?
Forget the benefits for a moment and think hard at where you want to be in 4-6 months, would you rather continue your growth now or then?
Even if you can do a lot of stuff in css, sometimes you shouldn't do them. Razvan Caliman from Adobe has some good points on this topic: https://youtu.be/WupAsZGHDcY