What makes nurburgring track is the best one?

What makes nurburgring track is the best one?
The Nurburgring is an old track that has changed very little over the years. Because of the sheer length of the track (over 13 miles) the area it covers is able to house garages for many different car manufacturers, including Aston Martin, Porsche, and Nissan.
The old fashioned nature of the track means that it is the ideal place to develop track based cars. The amount of mechanical grip required to post fast times at the Nurburgring means that most cars developed here have very hard suspension settings, and are often very uncomfortable to drive on main roads. Some people even say that using the Nurburgring to develop a road car ruins the car.