Hello, I just realized that the CC requirements for the A320/B737 are a bit off:
A319/A319neo/B737: 3, but the B737max: 4 (ok, the B737max has a rather high max-seating)
A320/A320neo/B738: 4, but the B738max: 5 (yes, the B738 has higher seating than the A320, but much less than the 4-CC A321/A321neo)
A321/A321neo/B739: 4, but the B739max: 5 (the 739max has only 220 seats, the A321 up to 236 seats)
Would generally be nice if there would be a minimum requirement and a "per seat"-calculated-requirement, so that one knows how many flight attendants one needs for a certain cabin.