When the coolant level is okay, and the colour of the coolant looks good, that’s the extent of the maintenance programs too many engines are subject to. Most modern engines are equipped with technology that gives instant feedback on various electrical and mechanical systems, where-as previous/older engines just had a gauge or indicator light to indicate something might need to be checked. Regardless of engine age, human interaction is still required when performing maintenance or visual inspections to maintain these systems properly.
In fact, the cooling system is no less important than the maintenance required of lubrication or fuel systems.
