Yes, the RCF is a gentleman's express for those of us who have (kind o) grown up. Its great for long cross-continent hauls, but also a hoot on the right windy roads. However, they need to be wide and fairly well surfaced for me to fell secure going for it.
I have a 2006 Subaru, which is notably narrower, 4wd and much more expendable if I fancy playing around a bit.
I would think the Mk5 Supra would have a similar type of warranty to Lexus. I've got no idea about an M2 these days, but it used to be the case that BMW M cars, Audi RS models and Mercedes AMG versions all used to have frightening warranty costs compared to ours. It comes down to the expected cost of repair, and their desire to make a profit. German reliability being far short of Japanese means they need to pass the extra costs onto the customer.