Personally at that time (circa 2013 I think) I wasn't using it because it lacked integrated features like debugger or good autocomplete. I was using a specific editor, but one editor per language (java = eclipse, C++ = QTCreator, C = geany). I feel like there wasn't a true "one size fits all" editor (except maybe Vim, but it felt so... unfriendly?). Also, I'm not sure it was available on Linux (don't quote me on that)