Optimizing for price and availability is also a thing; e.g. TL072 is cheaper at Tayda, and they don’t have 4572 (Mouser has it, but it’s more expensive than a 4069 and 4071 combined). The fewer different components you use, the easier sourcing and BOM/stock management gets (cf. earlier discussions about trivial designs that require E96 resistors 
).
(somewhat related, Dave Jones posted a video on BOM optimization recently, even if that mostly focuses on resistor & capacitor values and SMD machine constraints.)