I might've found a bug. There don't seem to be any mechanical retirements after the player retires. So far with this mod, I've done 3 races. In the first one, I retired early, and the only other retirements were a single car before me. In the second one, I competed the race and there were 10 retirements. In the third one, there were 4 retirements, then I retired early again, and there were no more AI retirements.
Also, is there a way to not make cars simply disappear as soon as they retire mid-race? Maybe give it a delay and, if there are debris, deploy the safety car until the damage is cleared. That's usually the reason a safety car comes out, hence why it doesn't come out much. I feel this would benefit the realism aspect of this mod.