Haha! I did, but not for a few years, until I took up Pascal and MacOS and then wanted to find a way around the 32k text limit that was a stubbornly difficult problem to solve for a while (and was the original reason that BBEdit became so popular).
Trying to correctly render a vertical blinking cursor on top of proportional fonts took me ages to get right...ish.
Trying to correctly render a vertical blinking cursor on top of proportional fonts took me ages to get right...ish.