Thanks again for the compliments on the build!
As far as the bubble tops go, I always thought it was about the look, not the practicality of the vehicle. I always thought bubble tops looked really "Far Out" in a cool way. Remember, they are show cars, not production vehicles. Too much glass in the south can bake anything! That's why the Ford Probe and the AMC Pacer went bye bye so fast and the advent of window tinting became so popular.
And...couldja imagine a bubble top in a hail storm?!??! Ohhh....the horror!!
The Orbitron was kinda fugly, Roth himself was never really happy with the way it turned out. Said he shoulda let the engine be seen instead of putting it under a bonnet. If you do a search, you can find the whole story behind the rediscovery of the car. The car was found in front of an adult book store in Mexico, and as you said it is being restored. Why is a good question!!