Don't worry. As soon as you explain to them that appending to a PathBuf is O(1) amortized they'll come around, and it will scale much better for all their GB-si

Don't worry. As soon as you explain to them that appending to a PathBuf is O(1) amortized they'll come around, and it will scale much better for all their GB-sized file paths. I guess this adds a prerequisite on complexity theory but nobody should go anywhere near advanced data structures like strings with less than a bachelor in CS.