Pretty simple. As it goes I currently have a regular tablet, and a tablet monitor. But along the way I got an iPad pro and apple pencil as a gift. I can say that out of the three I love drawing on the iPad the most. For whatever reason, I can't draw on my tablet or tablet monitor for more than maybe a half hour before my arm starts giving out. I've tried positioning the drawing monitor the same way I do with my iPad and the pain still comes back. Maybe it's the weight of the apple pencil or something, but it's defiantly more comfortable.
Drawing on regular tablets is a pretty useful skill, but is there any point if I've got something that's more comfortable?