Maybe 3D isn`t right term to describe "surrounding soundstage effect, frontal depth, height and such" but I have read enough about it and I don`t want to fall into this subject because it is too full of sceptics and ppl who consider only scientific facts, nubers (1&2-L&R) and don`t understand and consider many other factors.
Your thread was mainly only about height - which I admit not hearing much myself too in recordings but I do hear differences in frontal depth/distance and layering, stereo distance and separation - those alone/together can create pretty "holographic" illusion like You are in concert hall or in middle and surrounded by sounds/instruments. But like I told it depends on many factors and ppl who are just listening to typical heavily compressed pop-music with little details/effects and poor mastering, those ppl often don`t sense "holographic" soundstage as many audiophiles because their brain just isn`t used to and don`t know how to interpret those effects/sounds. I`ve "tested" this with many friends and they don`t sense where from one sound is coming or approaching (sound movement) so well as I and some other mates do.
But they get more "accurate" when I let them hear some binaural recordings or chesky test records. After they spent some time with such audio and better gear, they start to sense and understand better (brain is adjusting) to sound and its aspects.
I got similar test descriptions and opinions from Your thread too btw.
Well.... I`ll just stop it here and agree that "3D" is bad term describing sound and nor have I heard/sensed much height in recordings. There are better terms than "3D" for describing certain sound aspects.