imho this is one of those situations that has good and valid arguments on both sides. yes antifreeze is slippery there's no getting around that. i don't personally know just how effective additives are for preventing rust and corrosion but i understand and fully agree i don't want 10k worth of block and heads rotting away, corrosion in aluminum can be terrible under certain conditions. i wonder about the use of a sacrificial anode in these cooling systems and if that can stem the corrosion problem.

at a national or sportsman event where you're dealing solely with race cars i can see the no antifreeze being enforced but at a race where you have street cars running down the track i just don't see the point of people saying you shouldn't have antifreeze in the car.

for myself i run tap water but would prefer something that protects the investment in expensive parts.

i can really see this one both ways unless there is a suitable replacement to prevent the rust and corrosion.