We sometimes look back on the late '60s and '70s as the golden age of slot car racing. Honestly, there were very few tracks still around that could support a major racing event at all, so the racers then raced on anything that wanted to host them. It took building different cars for the different tracks, and I'm sure some of the racers were better on some tracks than others. If you wanted to race, you raced wherever there was one. Things started improving in the '80s, and with more tracks, it seems like the racers got more selective. If they only raced on Kings, then they didn't need to build a bunch of different cars, one style worked pretty much everywhere. I think some of what we've lost in recent years is seeing how racers adapt to different tracks. It makes a lot more work , though, and adds to cost. You also lose the quest for ultimate speed which seems for some to be the reason they race.
Ultimate speed also takes on different meanings. It can be the absolute fastest lap possible on a given track. It can also be the ultimate fastest lap with a particular style racing vehicle. Some aren't satisfied with anything less than a world land speed record. Others just want to have the fastest garden tractor in the country. It's amazing how we accommodate such diversity, but there may only be a couple racers at some of the events and a couple dozen at others (even no other racers at all). That doesn't seem to faze those that want to race that way.
It's become apparent that an ever smaller group of racers are able to keep up with the increasing speed. Slowing down might be for the greater good, but there's always that faction that's in search for the next record. I see the dwindling number of names in G7, guys that've decided for whatever reason it's not worth it to travel to the race. It's not cheap, either in terms of what the racing equipment costs or in just getting to the racing venue and being at the race site away from home for several days. The only real benefit is personal satisfaction and small recognition in the community which has to be weighed against the personal cost. As we age, other factors in our lives rise to importance, and likely meet with all not able to be funded. The lowest priority drops off the list.
Maybe, like the world land speed record, we have a periodic event where the racers that want to be the world record holders vie for what amounts to a TQ session. The person with the fastest time wins. It takes an hour. Then the rest of us race something that's more sensible for us to race together, like garden tractors or karts.