The Model T isn't boring. It's just boring in the context that we are forced to drive it. If Gran Turismo had unpaved farm roads with huge ruts, mud, and rocks, the Model T would be in one of its original elements. Even some city streets of its time were unpaved and messy, shared with horses and trollies. Et cetera.
I don't think I finished golding the S licenses, yet. I did up to IA though. IA-16 was my final gold. I'm sure I've golded a few S-license tests as well, but I'd have to take a peek at one of my memory cards to see which ones.
Try the Model-T at Tsukuba wet.
The effort involved in achieving all gold's, is far more satisfying than the Model-T prize you receive (IMHO).
Last gold for me; pretty sure it would have been S16, I did them pretty much in order.