Earlier quoted context omitted.
Actually modern datacenters, such as xAI's Memphis one, are now using liquid cooling since the power density of SOTA chips demands it.
That's inevitable, really, given the way power densities have been increasing. I wouldn't be surprised if people weren't also experimenting with high pressure Helium and similar technologies. It's certainly a far cry from opening some windows and stringing a few fans together in the hope that the chilly outside air will be enough to keep things cool!
Before we go down that path, datacenters full of oil tubs seems to be a trend in some spaces. Very good cooling power, low-tech heat extraction (small pumps to make the oil move, car radiators with big simple plumbing... do the trick well).