Do they live by the ocean and their rotors rusted badly? Seems crazy they would have needed replacement that some especially for a garage parked car.
I know right? Garage parked car. Average 15 km daily round trip. Eco driving, coast and stop.
I helped my parents set up the car settings, mostly defaults, they never use the lane keep assist features or other new stuff, really, most of the new elements of the car are no better for their very narrow use over the old Corolla.
I've driven their old Corolla and the new Corolla, for me, the new one is nicer, but the tech is not really compelling especially the lane keep assist which swims a bit in the lane.
The Corolla is the most common rental I get, on purpose, I prefer it as a rental even though I could get much larger cars as it uses the least gas and most rental locations do not offer EV's on the work plan I need to use. Hoping EV's are offered via large vendor rental in the next year or two.