Regarding the question of dust control, I didn't add it to either of my saws for the health reasons. I just wanted a way to keep the flying dust down so the my shop stays a bit cleaner. I do wear a dust mask most of the time. At least when I remember to put it on.
As to dust control built into the saws, those manufacturers who actually produce their saws like Hegner and Bushton/Hawk etc, why don't they design something that is an add-on to their product and offer it as such? I realize that building it into the saw increases the cost and the retail price. So, offer it as an add-on item and let the owner of the saw decide if they want to purchase it. No different than what the folks at ScrollNado have done. If we owners can come up with some sort of piping to keep the dust down, I'm sure the saw builders can do it too and probably come up with something better and maybe even quieter. Thanks for listening.