Yep, and from what I can tell, it's the fundamental nature of the car, too. From what I've been reading, it's very 'on the nose' ... i.e. it's very well-planted on the front, turns in extremely well, and is prone much more to oversteer than understeer. So it needs someone who can handle that. Apparently most engineers would design as much of that into a car as they can get away with because it results in quicker cars, except that most drivers even in F1 don't like the car so 'pointy' or twitchy. It's not just Checo. You put most guys in that second seat and they'd struggle because of that. There are a handful of guys who don't mind a pointy front end, and from most accounts I'm reading, Max is the best at handling the oversteer it creates. So basically they have a car that's extremely quick at least in part because of how pointy it is, and they have the guy with the best ability to handle that, so they don't have to dial it out to compensate for the driver like they'd usually have to do.