Always said hot water suits were for wimps until I did a winter river job
I used to think diving in a dry suit with layers was enough, and hot water systems were just extra hassle. But after spending hours in near-freezing water fixing a bridge piling, my hands were so numb I couldn't hold my tools. The next day, I tried a hot water suit on the same job and felt like I could work twice as long without shaking. Now I won't take a cold water job without one, it's that simple.