not OP but I think trackballs are superior because of 3 reasons:

1. they don’t move so you can blindly reach where you set them and they’ll be there making them a better extention of the keyboard
2. because they do not move, you’ll never find yourself in a delicate operation while getting to an uncomfortable position at the end of the mat or the table or run out of room against the keyboard
3. you can lay back and chill while operating them just the same resting on your lap or chests or wherever