Another comment relative to cost limiting classes.
I think cost is one of the big drivers in new little classes (grass roots racing classes, if you will) springing up...like the recent interest in the Recoil. It is affordable. But, eventually this is followed by the death spiral of the class as people figure out expensive hardware to optimize their cars and it becomes more and more expensive.
It happens over and over.
Micro-RS4 is fun and inexpensive. Then there are special $120 dollar chassis's for better handling. Then special split battery packs you need to fab yourself to fit on these new wider chassis's. Then modded chassis's that can take 540 motors. Special drivetrains to handle all the power...suspension components. Next thing you know you feel you need a $4000 RC to compete.
Mini-Z started out as the next great stock class but has gotten crazy with special fabbed components, motors, imported rare tires...etc.
All of this is daunting to the newcomer...and overwhelmingly expensive and offputting to the veterans.
It can sneak up on you but eventually, the typical person will look elsewhere. Maybe it is to the next new class, but unfortunately, a lot of times it is elsewhere outside the sport.
Sports, like Basketball, realized they had to limit team's salaries lest the high salaries drive all other costs up, and ultimately to the consumer...the ticket purchaser...the TV viewer...who was being driven away. This also created more equity amongst the teams which fostered more exciting competition.
It is time the RC sport embraced the same kind of consumer consciousness.