I recall reading stuff like this not only on guitars, but of other instruments, as well. One that sticks out in my mind is of the legendary Stradivarius and what the heck makes these violins so "peculiar." The bottom line is it seems there is no single bottom line. How's that for conclusive

My thought on this stuff is pretty simple: if it sounds good now, it "can" sound better later, but may also end up sounding the same. Which is fine
if it sounded good at the "now" stage, right?
There are just way too many variables in a guitar, from the wood species, all the joints and glue, the finish, the build process, to the conditions the whole guitar/instrument lives under each day it ages over those 10, 20, or 389 years. Hoping any guitar will "open up" is a hope, at best. Still, articles like this feed the "inner geek" in me and make for fun reading and wishful speculation.

Edward