I daily drive a 68 dart and I'm 35. Although I realize that's rare, we do exist.
It depends on where someone grew up and what things they saw in the their surroundings as they grew up. My adoptive dad still has his A56 69 cuda that he bought as a used car in 1972 so I grew up seeing that car and riding in that car and even when I was young I knew it was different than new cars at the time, but it just seemed normal to me because I saw it everyday. I didn't know anything about A56 and 340s or what I was looking at till later in life but that comes with evolution.