– Barcelona, Spain It takes a lot of driving to develop a new car, even one that's an evolution of a tried-and-true formula, one that's more nuance than new, more refresh than reboot. This is the upcoming 2024 Porsche Panamera, and by the time you read this, it will have been in development for three years and three million miles, tested everywhere from 122 degrees Fahrenheit in Death Valley to -22 in Finland. My time in the car, I'm happy to say, was rather more temperate: a sunny day just outside Barcelona, Spain. The nuances of the new Panamera were…