It's like some people are sensitive to latency and some aren't.
I've also been told it's impossible to tell the difference between 60hz and 144hz. I can tell. I know this for a fact because my hackintosh will occasionally "forget" and switch my monitor back to 60hz when I wake it up from sleep. I notice immediately.
I can also pick up on different refresh rates, and I was extremely sensitive to it on CRTs back in the 90s and early 2000s. I had to run at least 75Hz on a CRT or I'd have too much "shimmy" in the image and would get a headache in a few minutes of work. 60Hz on an LCD doesn't typically bother me unless its grey-to-grey response time is poor, and produces ghosting. Even with that I don't seem to get headaches from LCDs.
Thank goodness VR came along with its extreme latency-sensitivity and suddenly everyone else cared about maximum frame time too.
Atom seemed promising and fast enough (I couldn't perceive any slowness), but once I started adding plugins to match the features I liked out of Sublime, I found Atom got really sluggish. I haven't tried any other electron-based editors, but I doubt it has the plugin ecosystem to compete with Sublime to VS, or any other big players.
I didn't realize how important having a responsive text-editor is, though. We expect a lot to happen with each keystroke, and we expect it all to happen before we press the next key. This is why I don't think that text editors are best done in JS.
That said, if this new text editor doesn't have features that compare with Sublime, then it isn't much better than Atom is to me.