I agree with your comment, and actually have not thought about the tank vs tub issue in that way before. I just naturally thought that it was the owners preferance as it would not effect the snake being in a small tub, this is what most care sheets and you tube videos show. I can understand the use of tubs from a breeders point of view for practicality, but maybe owners should provide more climbing space?
Yes it is harder to keep temps stable and humidity in, but it is possible with a little work. I spent a whole week getting it right before my baby ball went in. Now i think his enjoying his tank with those places to climb and hang out in. When he first went in as i said before he stretched his whole body up to the roof of the cage, so height of the tank and climbing may play an important part of his life.
Would be good to still here others point of view, tank vs tub. Ground dwellers and climbers?