Where Sublime shines for me is opening large files, and opening pretty much any file. So many times MacOS wants me to open a json file in Xcode, or a txt file in TextEdit, when all i want to do is open it in Sublime! And I know that i can open files that are multiple GB without issues, just takes a few seconds :P
And the Ctrl-D shortcut and multi-cursor in general is so neat. I know other editors have it too now, but when I showed my wife how useful it was for simple tasks like formatting a list of emails...she ended up making her company buy her a license and teaching others how to use it.