Always wondered if the appeal of DSOTM came from the band touring and tweaking the album before it was released.
I saw this' Eclipse a piece for assorted lunatics' concert which was the working title at the time and still have the program that was handed out, Philadelphia Spectrum 4/29/72 nearly a year before the March 1973 album release.
The sound system at the show was mind blowing, 4 channel PA on the hockey rink level and 3 PA clusters on both the 2nd and 3rd levels of the venue.
I believe they were working out and experimenting with song things based on audience reaction. Judging by sales, this approach to touring/tweaking before release was a smashing success.