Here is a little more info on the clearance requirement, attributed to Brembo:
https://www.racetechnologies.com/art...rake-clearance
spoke-top-clearance_2855
Allow 3mm in all directions from the caliper to the wheel. Note: the imagery and highlighted areas is meant to be an approximation to help illustrate the tutorial.
Probably meant for race/track application vs. potential road hazards but it does address my concern about hot calipers close to the wheel.