In terms of the cooling stuff, the 3 is notable because it will hypothetically sell for $35k. Judging from this guy running his almost base (except long range battery) 3 at Laguna Seca, the $35k car one can actually do almost the same thing in terms of running with minimal cooling throttle back as the Performance version except it will not have the 3.5s 0-60 nor will it have the Track Mode function.
Much more expensive electric cars, and race cars, have had no issues with cooling awhile now.
https://en.wikipedia.org/wiki/Formula_E
Formula E has been operating for some years and their cars have pretty hefty cooling in place. They used to have to hot-swap cars during races not because of cooling but because they needed the batteries to be lighter for racing and so the capacity was smaller. But even that is going away soon as they are now moving to a higher-density battery pack for next season.
In terms of road cars, both the NIO EP9 and the Rimac Concept One (which Richard Hammond famously crashed on The Grand Tour) are supercars that don't overheat when driven hard for a long time. The upcoming $200k new Tesla Roadster will presumably also not have problems with overheating.
NIO EP9 running the Nurburgring without any heat issues: