There is a key feature I miss. In iRacing, as a successful competitor, there are 24h long practice only sessions. This provide racers the possibility to not only practice but more to compare themselves to the others, and then jump to the races. When you enter to the system, and the race you think to race is about to start in maybe 40 minutes, you can practice this time. And yes, in RaceRoom you can practice solo or against the AI, but this is not simracing, simracing is about to race against other humans.