Never bothers me, the whole ‘wire’ hose thing.
I’ve used hot, found it a faff, these diesel heaters seem to be a faff as well.
I’m happy with cold, never got more work done with hot anyway. It’s just a luxury that adds costs.
No doubt hot is better in some instances, but for me, I can’t be bothered with the faff/extra cost.
Especially as I use a wfp link to turn the water on and off. I never leave the water running as pure is like Gold round my way, hardest water in the U.K.