I've owned six cars, none had traction control. Or ABS, for that matter. One of them had power windows and door locks, that was nice. Wait, what was I talking about?
I actually wouldn't mind at all if GT transmissions mirrored their real world counterparts. By that I mean:
In a car with an old-fashioned slushbox, you can use auto mode only.
In a car with a manumatic/automanual, you can select either auto or manual mode.
In a car with a manual, you can use manual mode only.
If you wanted to auto shift a car that came with a manual transmission you'd have to swap in a transmission capable of auto mode. Not that Kaz would ever implement that sort of thing, but I would.