I've spent years in Eclipse as well (and still use it every day at work for Java stuff), and I appreciate a lot of the functionality it offers, but I definitely

I've spent years in Eclipse as well (and still use it every day at work for Java stuff), and I appreciate a lot of the functionality it offers, but I definitely find the UX lacking. It's klunky. Yes, it's maybe more discoverable (although, at least in the case of Ecipse, that's debatable) and some of the keybindings are probably more familiar to most people, but I find that even though Emacs has a bit of a learning curve, once you've gotten past that, the experience of actually using it is very fluid and productive.