My theory is:
It had 4 seats instead of 2.
It didn't have forced induction options.
Too many people believed other people who have never driven a rotary but heard they are unreliable, which hurt sales.
Women often bought these cars and didn't maintain them even more so than their average engine.
Very bad marketing as they were trying to convince the older male to buy them for sporty fun when they could have bought an MX-5 or an S2k since the RX8 wasn't properly committed to be a full on sports car.
Nobody in 'muricuh wants a car that is fast in the corners except webos and loners, who all bought S2k's.
Way way way too small of an aftermarket scene.
"Premixing is for try hards." Even though you should premix any track day engine, piston or otherwise.
Heavier than it should have been.>>18804887
Your mom says the same thing about your homework.>>18804890
Mostly this. I do wish they designed it a touch lighter. 100 pounds goes a long way.