VSCode can also be used more or less effectively though. There are quite a few shortcuts & tricks that can make you 10x more productive, even if maybe it's not as much as vim.
Multi-cursor on ten lines, sure. You get 10x for some seconds or maybe minutes. I'd expect practically zero people have gotten 3x more productive over a two week period for having advanced knowledge of tips and tricks in their editor. Saying 10x seems a wild exaggeration