Even if I do not want to fundamentally contradict these assertions and can well imagine that there are models to which this applies, I would like to contradict the generalist presentation.
I own a 92-93 54RI MIJ, an 83 JV 62RI and a MIA AV57 from the year 2000/01.
The 54er is probably made of basswood and this wood is not of inferior quality, nor does the guitar sound bad because of it. This wood is sometimes also used for very expensive instruments. The neck is really a fat V-profile, but I think that's very close to the original. The paint on the neck is by no means applied too thickly.
The neck profile of the JV Strat is the slimmest of the three guitars described. It has a Rosewood fingerboard and therefore of course no varnish on the fingerboard
The AV also has a V-shaped neck. But overall it is much thinner than that of the 54s and the V is also much less pronounced. What you get along with is probably just a question of getting used to and taste. I like all 3 guitars and their different necks. But I think the JV has the highest manufacturing quality of these three instruments.
"thick poly" at my 54RI MIJ, obviously not thick enough:
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