That is well thought through design, and a nice end product!
I like how it is modular, so over time if you shift components, your rack can grow, shrink and adapt with you.
I did not consider that as much back in 1993 when I built mine. The darn internet did not exist then either, so it was a full dream up, and wander around Home Depot, and then off to a lumber place to get wood laminated together to fit the size I was thinking up.
Here is a pic from the early 2000's, in my old house with the finished basement. All components are now different thanks to AC!