Bum rushed? Brushless motors were legal in mod for a full year before anyone really tried anything with them. When a handful of top drivers started playing with them, they weren't sure of any performance advantage, but they loved the idea that they didn't have to slave over the motor between rounds. They could spend more time on car setup. And when they were finished with that, they could talk to other people. They started having fun racing again!!!

Other racers heard about that and demanded that ROAR come up with brushless spec classes. ROAR quite correctly came up with brushless equivalents that were slightly slower than their brushed counterparts, slowing the transition from brushed to brushless. Racers have a choice between the power advantage of a brushed motor, or the ease of maintenance of a brushless motor. No one envisioned the mass exodus from brushed to brushless.

I have always said that this is a hobby before it's a sport. The purpose of a hobby is to have fun in the end. No one was having fun rebuilding motors after each round. You could make the argument that if you're willing to do the work you could make a brushed motor/NiMH battery combo work better than a brushless setup. No one wants to do that kind of work. Now wether that's a good thing or bad thing is the topic of another argument!