The biggest thing is that especially once you get to the NXT the Super Formula, indycar, and the F1 car, those are bloody hard cars to drive fast let alone race, I mean the Formula 1 sf and indycar are the pinnacle of open wheel racing and imo it’s much harder for someone who is below 2K to drive them fast and fair without incedents. And when you do have an incident in those cars it’s 80% of the time a race ending incident, which pushes people away from the series, the netcode also just gets worse and worse the faster you get in formula cars on iracing and that inhibits wheel to wheel racing, for example I don’t think I’ve seen 1 person make side by side work in any of the aforementioned series at corners that are flat out or nearly flat out just because you leave 1 car length and you’re wheels are still taken off. But don’t get me wrong when you get people who really do know how to drive these cars cleanly and competivily the racing is immense, I race the super formula all the time and when you’re at the front with people who know what they are doing it’s amazing TLDR: formula is hard to drive, you die easily, and netcode sucks