United Artists has pretty much disappeared from consciousness.
UA was probably the premiere studio in the 50's and 60's and made many films that traditional studios like MGM would never have touched. Their low-overhead operation attracted film makers like Stanley Kramer and Burt Lancaster. They made great movies that won awards and also made money.
It is unfortunate that the team assembled by Arthur Krim and the work that they did does not get more appreciation for its own right.
MGM certainly made wonderful movies during its golden age but that ended sometime in the 50's. We still celebrate MGM, as we should, but have forgotten UA as its own entity.