But I do wonder whether some languages have debugging problems that require "keeping more state" to solve them than others, such that the developers doing debugging in those languages would rather forge ahead and finish, than drop it and pick it back up the next day. That'd be an interesting thing to measure.
It'd also be interesting if some languages attract certain developers, because the attention-span and "mental stack size" the language designers assumed for the language, feel better suited to them. Maybe there are languages better for people who can juggle many or few facts at once; languages better for people who can hold three screens of text in their head, or who prefer to only have to think about one line at a time; etc?