Yet vim is still more popular today by a wide margin. :)
It's not just about memory usage; it's about lag. Atom felt laggy to me. I also value my time, and I can't stand waiting for my editor.
But try VSCode. I do not notice any lag on the Mac.
I still prefer Emacs due to the maturity of its packages. But I have used VSCode for a month and I have no complaints about the performance.