IIRC, the 1011 lacked the payload/range to be competitive with the DC-10 and 747. The DC-10 is a pilot's airplane, and the 1011 is an engineering marvel of efficient design.
it was said lockheed had forgotten how to quieten cabins for paying passengers
Back in the day, a McDouglas rep told me that Lockheed design engineers were much smarter than DAC and Boeing engineers. They all had the problem of the 3600 rpm N1 buzzsaw noise at takeoff. LCC worked hard and eliminated most of the noise at the source, drilling vanes, etc. BAC and DAC merely added a ton of sheet lead to the sidewalls of their planes so the pax wouldn't hear the buzzsaws so loud.
Guess what? At cruise the DC-10 and 747 had quiet cabins, thanks to that ton of sheet lead, while the L-1011 had all the unmuffled noise.
GB