I guess we have 3 types of "normal" classics these days in my eyes.
Actual classics. everything from a basic mk1 Fiesta or basic mk1 scirocco and older (now going up in value)
Resales classics. Clubsport S (probably), GTi mk1 campaign? E30 M3, Escort RS Turbo, Cosworth (serious money involved but a long time down the road)
Review classics. Clubsport S (probably), Mk2 GTi 16v, Mk5 GTi people love them and reviewers build it into a classic status even if lots are still around....
As MH says the cars with all the tech don't have the longevity simply due to the cost of long term maintenance, Some would rather scrap a IS200 Lexus or Saab 95 or future Mk7/8 (when a diesel pump fails or it loses engine compression as it makes it cost prohibitive to fix).
Saying that the Mk7 might do well as the 40th anniversary car in 20 years with new MQB design techniques (weight, strength) and reviewers do generally like it. In a way that it (according to reviews) build on the Mk5/6 and not as a step backwards.