Originally Posted by
revelstone
vin·tage (v
n
t
j)
adj. 1. Of or relating to a vintage.
2. Characterized by excellence, maturity, and enduring appeal; classic.
3. Old or outmoded.
4. a. Of the best:
played songs that were vintage Cole Porter.
So these adjective defintions, especially 2, capture the essence of what we mean, but give no guidance. It's all just subjective.
Paradoxically 3 connotes the opposite!