I’ve not heard of advice to avoid glycol coolant in non-pressurized automotive systems. A consideration for many engines is corrosion inhibition, see antifreeze topic at Wikipedia.
Ethylene or propylene glycol added to water reduces the heat capacity per cc, raises the boiling point, and reduces the freezing point.
Corrosion inhibitors are added according to metals present, for example aluminum, iron, steel …
I’ve been using hard Southern California water plus least expensive ethylene glycol in 50/50 mix for about 20 years in my Mark V with same radiator and engine over that period. No deleterious effects and no overheating problems with no added cooling aids. Car was my daily driver for first decade. We don’t get below freezing in my neighborhood and only over 100 deg F a few days a year.