Trust me, I'd love to have a real spring reverb (or a real plate reverb, or a cool cave to play in all the time with some different bass traps and wall damping material to experiment with, or a tile bathroom or marble room to play in, etc, etc, etc). However, the main reason I don't want to get a real spring reverb is simply because of the added weight and the space it would take up. I want to keep my pedalboard down at the PT-Mini level if I can (I used to own a PT-Pro/HC and it was a beast to haul around) to keep my lower back happy (its permanently injured from a hard labor job I had a few years back).I picked to last option. I actually do like reverb but not pedal ones. I like springs. I think someone makes a real spring pedal but I can't remember who.
Otherwise, it would be fun to have real springs that I could also kick for the thunder effect.