I’m just in a process of switching from other editors to Atom, and so far it’s quite promising. There are some things I miss from Kate (been using it before they crippled code folding couple of years ago).
One is that Kate has the ability to mark lines of code you changed or changed and saved in current session. The markers are thin vertical lines next to line numbers, and they are visible in kate’s mini-map. These markers allow you to almost instantly jump to recently edited portions of code. A great time saver.