[avgcorrection]

Modifier keycombos are often harder to use than simple keypresses. First of all because it involves two hands (if touch typing) and second of all because you have to coordinate the hands so that you type the combo in the right order (e.g. control before C).

“But the home row.” Right. And that’s sometimes a plus. But (1) moving your hands a bit is often not a big deal (unless you have to go back and forth a lot—then I think it’s a drag), and (2) even if things like using the (F key layer) arrow keys might be comfortable, it might not be comfortable to have to use yet another modifier key in order to use common functions like move-by-word (e.g. Ctrl+Left) or even move-and-mark-by-word (Ctrl+Shift+Left).

It’s not an objective win either way. So you definitely cannot just say that it “isn’t a big deal” as if having to use another layer has no cost associated with it.