Yeah, the line between classic and modern is hard one to define. Note that I donīt use the word vintage but rather classic. Pretty much all 80s sounds to me are still in that classic arena, made from pickups which were very much based on the PAF but hotrodded and amps with the same notion. Then, somewhere in the 90s I guess there was a break, when things went so far from that original design that they became something new. Something modern.
This is something that mostly appears in cleans, but in the same way translates to dirty. There is that line, which is slightly different for everyone of course, where you either think that the cleans are classic or modern.
I will try to think of better terms, but to me classic is still very much connected to the PAF. Itīs its brother. The modern sound is the next generation. Derived from the same idea, but distinctly different.