How scandalous! I don't have a particular problem with omitting discrete pieces, actually, but cutting Carmina Burana down should have been a no-no. Seems this was discussed here too: https://www.quadraphonicquad.com/fo...-by-the-fine-folks-at-columbia-records.14329/ by @ArmyOfQuadThere were a handful of Columbia Masterworks quad releases where the Q8 version was truncated - it seems like the physical upper limit of Q8 tape (as you can see in @sjcorne 's photo above) was somewhere between 49 and 50 minutes (which would've been about 100 minutes in stereo) so they edited the tape down rather than put it on two 30 minute tapes which I guess wouldn't have been cost effective given the lower sales of classical Q8's.
Aside from the E. Power Biggs mentioned above, the other ones I've found that are shortened are:
Michael Tilson-Thomas/Cleveland Orchestra 'Carmina Burana' (QAX 33172)
Leonard Bernstein 'Candide - Original Cast Recording' (QSA 32923)
Pierre Boulez/NY Philharmonic 'Boulez Conducts Wagner' (MAQ 32296)
Pierre Boulez/NY Philharmonic 'Bartok: Miraculous Mandarin' (MAQ 31368) [omits the 'Dance Suite' entirely]
Daniel Barenboim/London Philharmonic 'Elgar: Pomp & Circumstance Marches / Crown of India Suite' (MAQ 32936) [omits 'Imperial March Op. 32' entirely]
Daniel Barenboim/London Philharmonic 'Elgar: Falstaff (MAQ 32599) [omits 'Cockaigne Overture, Op. 40' entirely]
This isn't an exhaustive list, but I think it's the majority of them.
I guess D-V should really release that Carmina Burana, given that there's no discrete versions available whatsoever... (here's a review for the unconvinced, of the stereo version: https://www.classicstoday.com/review/review-12621/)
I'm guessing Candide is the 1974 cast and not the original from 1956?