I buy all my guitars for how they sound NOW, not how they
might sound decades from now. If they improve (and I have experienced it) that is icing on the cake. If not, I started out with cake -- a great sounding guitar -- to begin with.
I fully expect that my Rainsong, Blackbird, Cargo and Emerald
will open up -- in about 50,000 years or so, and long after my wood guitars have turned to dust. The tricky part is being around to hear them.....