They're still around, here and there. Not as popular as they once were, but the hard-core racers are big ticket items. Check out this guy:
https://gerdingfasttracks.com/
If somebody had the wherewithall (not me! I don't have enough money to pay attention!), this is the guy that could hook you up for a 1st class model raceway. I even had dreams of a scale model Watkins Glenn road course (complete with scale elevation changes!). All it takes is money!....
Speaking of Watkins Glenn the kid who's house the track was in the basement of talked his dad to drive four or five of us kids down to the Glenn two different times. One time was for practice day and a year latter for actual race day. Yea about a half dozen 14-15 year olds just dropped off at the gate to wander about the grounds with no adult supervision, what could go wrong? More that once while walking around the track we were offered free bear by different guys there but we were more interested in the cars!
Just had to Google something, it must have been 1964 as the year was the first one for Honda to enter a car in Formula One racing. One thing about the Honda cars I recall was right near the start of the race one of them lost the front end body work but they just kept running it. don't think aerodynamics were as critical then as cars now days.
One other thing from the time we were there for practice day was I recall watching guys working on cars just out side the garage area. Really got a kick out of the guys working on one of the Ferrari's. It just would not start. Watched them even giving it a shot of ether starting fluid to no avail. Then as a last resort they tied a rope to one of the from A-arms and the other end to a Ford four door and took off down the gravel road to tow start it so they could do their practice laps. That's one of those times I wish I or someone had a camera to save that image "Ford verses Ferrari!". Enzo would not have been happy to see that one!