FYI: not only Prosche, EVERY PERFORMANCE/SUPERCAR have this issue, even today's turbo-charged cars, that's why STi comes with a spray button on the steering wheel.
it's simple physics/chemistry; when we create lots internal combustion, we don't use all the energy, actually at least 50~70% gets wasted as heat, when we drive it for a long period, they accumulate, in a little space called the engine room
in case you don't konw, ALL super-sports comes with engine temp gauge, it's for the owner's to watch.
BTW, even a small Geely has a engine-hot warming light, if the owner chose to ignore it, so be it