This is an Internet forum, 90% of it is random dudes guessing - I think you maybe have got it confused with a peer reviewed academic journal or something - You asked for a logical reason why vintage could be considered different to modern- my answer was worded deliberately loosely to answer the question of “what could a logical reason be” based on things I know - but loosely enough that I might not be correct, and also I’m not going to make any claim that old wood makes better sounding instruments. But you asked for a logical reason that might apply, I provided one- discuss away . That’s how discussion forums work.
Even if you disagree shouting out “What’s your source” or asking for data points that you know conceivably don’t exist, (or if they do would be hidden within academic papers beyond most of the reader’s comprehension) is a bit of a Richard move.
For example “The likes of the very highly rated early 80's Japanese stuff (Squier aside) has not appreciated to the same degree as the big F (or S).“ have you got a source for that? Peer reviewed study. I mean it would be interesting to have a thread and try and work out the relative increases from retail to now On a load of high end Japanese stuff, and see the degrees of change in appreciation of different brands - but nah forget it What’s your source?