Compared to the early 80's when I first started driving, the number of manufacturers offering vehicles with various models to cater for varying levels of taste and performance today is mind blowing compared to 30 years ago.
I saw a Holden Cruze with Chev badges on it last week, what a joke.
Car clubs were pretty common back in the day, because they provided a means by which people could share ideas to do their own performance or appearance improvements.
I don't think it is a much a necessity today as the manufacturers are cashing in now and nearly all of them offer a 'sport' model in their lineup.
Look back as far as only 10-15 years ago with the VT commodore lineup and the number of after market body kits that were on offer.
Look today at the number of Commodore SV6, Ford XR6's on the road, it's chalk and cheese. Perhaps people are more conscious of the fact that after market add-ons can actually devalue a car, and the dealers are quite happy to give lower trade-in on cars that use after market parts compared to genuine parts.