What sort of routine maintenance the manufacture recommends varies car to car. That’s where to start looking for this sort of information for your car. On all the cars I’ve owned & maintained, I replace the coolant every 2-3 years, and the fuel filter every 75K miles (for big fuel filters like the Corolla uses). I’ve never proactively replaced a thermostat, water pump, or anything in the pcv system. But I have replaced all those items, multiple occurrences, at various times on various cars; but only when testing shows they are faulty. Remember that the manufacturer has multiple conflicts of interest on their recommended scheduled maintenance data, so it is usually better for the car owner wanting to drive it a long time to follow a maintenance schedule with shorter intervals.