I tend to overdo cage size for my snakes. My BP currently is in a 6X2X1' enclosure. It's part of a stack and my BCI and BTS need and want the space. So, even my corn snake is in a 6X2!
However, as long as there is a good temperature gradient, proper humidity, and the enclosure, whatever it is, is kept clean, I do not think the snake cares.
We do tend to anthropomorphize too much. Even with dogs, we tend to overdo it. Snakes do not think like we do. They just want basic needs met.
In no particular order:
1. Heat/Temp Gradient
2. Humidity
3. Security
4. Cleanliness
5. Food
6. Water
I think snakes, especially BP's, who like to borough in nature, like to feel safe and do in tight spaces. My BP spends 90% of her time in a hide, if not more.
Racks can make it easier for a snake to feel secure.
Having said that, you can do things in tanks to create a similar effect.
Bottom line, I do not think yellow will hold it against you at all. If you meet his basic needs, he will be fine. He likely won't even remember the old tank about 5 minutes after you move him into the new one! No offense to Yellow, but snakes really tend to live in the moment.
I would leave him alone for a week to get settled if you move him.
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