I've always understood that GH got into the Leslie after hearing Jesse Ed Davis use one with Taj Mahal. There came a time when JED basically never turned the thing off he used it so much!
You got that right!
Yes, I wonder if something like a Rotovibe pedal can get a similar sound without having to lug a heavy Leslie cabinet to gigs!I see a few of the Fender Leslie units for sale. To me the real issue is moving it and the foot print it takes up. In the context of a band there are pedals which can get you close to the sound without the cabinet. I kind of agree with those who pointed out that it’s a bit of a one trick pony effect.