You wait. Building codes will be changed making sprinkers manditory in garages. Crazy begets more crazy.
Sprinklers are already required in about 70% of the parking garages.
Something somewhat connected that most people don’t consider is that fire trucks don’t fit in parking garages. A fire in a parking garage has to be fought from stand-pipes in stairwells and from the outside by snorkel truck.
Sprinkers won't put out an EV lithium battery fire.