One poster has noted on other questions that a 4-4 trump fit was better almost a trick better than a 5-3 trump fit,and had a smaller premium over a 5-4 fit because of the ability to make either hand the master hand.
I could see that being the case where the two hands both had HHxx, where the "H's" are honor cards, and the x's are random small cards. But about "extreme" cases like AKQ6 opposite 5432, or JTxx opposite xxxx? How would the 4-4 advantage still hold? In the latter case for instance, I would welcome a fifth trump in either hand, because if it were a "spot," it would be a "long" trump after the opponents take their honors, and if it were a Queen or better, it would be a third honor?
In response to my Stayman question, the same poster (Pieter Geerkens) noted that one of the weaknesses of the four card heart suit was its lack of a ten (an honor) or nine (close enough). Could a lack of honors in "four card" major suit like 8632 dissuade one from using Stayman, or otherwise seeking a 4-4 fit?