i was wondering, what were the parameters that decide "how technically challenging a track is...?" Pls share your insights on this...
To me, "technically challenging" means a very slight error can have dire consequences (ie: retirement). This automatically eliminates all Tilke tracks from such a description. It means that Monaco is at or near the top of the list due to the confined nature of the circuit.
Not sure if, other than Turkey, any Tilke circuits have multiple apex or a parabolical corners.