Jailbreaking doesn't add much functionality as it used to like 2-3 years ago. I guess at this point jailbreaking is for people who like themes and such.
The biggest benefits of jailbreaking are already integrated by in iOS.
My last jailbreaking was on iOS 7. Since iOS 8 I don't feel the need for it anymore.
I agree somewhat. Since I got the SE, I've noticed the things I really miss are swipe selection, and virtua home.
That being said, activator is a game changer. I don't like manually having to set my brightness. I don't like having to change phone volume when I connect my headphones, etc...
Also emulation third party controllers and kodi.
If I knew there'd be no jailbreak, and Android had a good 4"phone, I'd switch today.