Most likely yeah. I remember reading here about the fairytale that is Japanese chalk and that US professors were hoarding it. I assume it must feel orgasmic.
We didn't have that kind of opulence in Eastern Europe. Chalk and blackboards here sucked ass, including the cleanup process students were responsible for. Schools switched to whiteboards and markers ASAP.
Although much easier to maintain, whiteboards and markers have shitty contrast, especially if light or reflections hit them at the wrong angle. Matte blackboards were much better at absorbing light and unwanted reflections which I guess is why they're still used today.