> Pretty much all the most popular languages have settled on zero-based indexing.

Maybe true depending how you count, but there is plenty of code in languages with 1-based indexing too. My day-to-day these days is all MATLAB (1-based), except for the occasional optimized algorithm written in C. So I'm equally sensitive to being pedantic about "0 is actually better". They lend themselves well to different habits of reasoning. Switching back and forth can be painful if I don't take care.