I enjoy using chalkboards so much more than whiteboards. Other than the chalk dust, I just can't understand how anyone would prefer whiteboards over chalkboards.
Also different colors on whiteboards is occasionally helpful for clarity, e.g. color-coding an equation to a line in a graph. But that's pretty minor.
You know, the worst part that makes them unbearable and a literal health hazard to use.
Yes, because I carry large amounts of water around with me for every lecture that I teach. Seriously? The board is covered with dust, the chalk tray is covered with dust and the floor nearby is covered with dust. No one cleans them at my school.
The fix is just to use whiteboards which are just better for everyone who doesn't have a fixation with chalkboards.