I don't use a rack system. However, I do use tubs so they are pretty much the same minus the shelf and flex watt tape and such. I used to use glass tanks for my bp thinking that it was better than tubs. Nope. Not at all. Like you said, I don't see my snake 90% of the time either. He was hiding all the time which was good but defeats the purpose to be able to see him through the glass. Secondly, humidity was a pain to keep up, and I tried using the proper substrate, misting, larger water bowl, etc. Lastly, my bp was new so he was stressed out and refusing food. Temps were fine, hides were fine, his first shed with me which happened days after purchase was terrible, but he was not happy.

Switching him to a small tub was probably the best thing I could do for him. Humidity is at 60-70%. He eats well now, even recently switched to f/t with zero issues. He had his second shed which was 90% one piece. A piece was stuck to his tail and cloaca which was easily removed with some soaking. I think if I had close some of the tub air holes to increase the humidity to upper 70s, that might help with a better shed next time. Not to mention, easy to clean and move around. If I want to see or handle him, I just pull the lid off and pick him up.

I also use a tub for my Cal king snake. A 65 qt tub. Her first shed with me went perfect.

Both snakes don't seem to mind or care that they are in tubs. I do add enough substrate for burrowing, hides and fake plants in there.

Honestly, if I were to collect more snakes, I would go for the rack system.