Ha ha ha. I had the mispleasure of driving a Toyota Camry around Tasmania for a week. My gosh my lounge is firmer than that. I agree, nothing like a firm seat for better comfort and support.
Each to their own I guess, I hate the BA Club Europe seat, the QF 734's have the same seat essentially in J and I can't stand them, always seem to slant off to one side, its like sitting crooked.
I have done at least 1,000,000 miles in the QF slimline seats and not once have I longed for something softer, apart from of course an op-up to J or perhaps P. Even my pillow and mattress is nice and firm.