Long ago, the guy who started me off down this path told me about his experience at TWA.
The company really pressed people to use the AP and not hand-fly. It was more efficient they said, and conserved fuel. Spike pointed out that during pro-checks in the sim, the guys most prone to busting rides were the ones that followed the compay’s proceedures most closely. I.E., the AP always “on” guys.
I’ve always remembered that and try to hand-fly quite a bit down low.
(It’s more fun anyway.)