I took a job at a subcontracting about 9 years ago, where I was mostly doing Node.js work, but there were some projects using Symfony, and even after using it on/off for a month, I have to say I never really "got" it. I could tell there's something there that's fairly cool, but I never really was able to wrap my head around all the folders.
I've become a way better programmer since then, so I have thought about trying it out again, but nothing in my day job uses PHP anymore, and I've moved away from web since then.