I think each car with its design has an ideal sweet spot max chassis roll angle. The trick is to accomplish that perfect roll angle with each person's unique weight distribution, and each track's specific surface friction.

Totaly random measure just for example. Lets say the B4 sweet spot roll angle is 10°s but your track has high grip that causes your current setup to roll 15° you would need to change camber setting to resist roll to accomplish 10°.

Lets say your track has low traction, the car spins out at 6° before reaching 10°. You will need to set camber to have less roll resistance to accomplish the sweet spot traction roll angle.

Now if the manufacturers could give us that sweetspot roll angle it would save us lotsa trial and error initially.