Yep, one finger per fret technique is over rated IMHO. I remember a Scott Devine video sometime ago where he more or less said the same thing.
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I don't think he said that. What he seemed to be saying, and I agree, is that both methods have equal.merit and that players should learn how to determine for themselves the right way to approach a given situation. That means being equally proficient in both fingering method or system. But fingering methods or systems are not posture. My experience tells me that good posture is important for any fingering method or system. Luckily for us, the basics of good posture remain the same, and don't change with the method. And that was the OP question.
You will see OFPF and 1-2-4 in my examples. I also use 1-3-4 and a hybrid 1-2/3-4, where 2/3 work the same position. What is important is the transitions are fluid and seamless and that posture is not lost during shifts or extensions.
