Err. Water and electricvity make a dangerous mix.
Ya. My air handling systems seem to deal with it OK.
They are kept in different places. Now think how are you going to combine hot-swappability and water cooling, and not let moisture to get out :)
I don't recall seeing any mops around when the CE's replaced a board on the 1100/90's. They were not "hot-swappable"--but nobody had thought of _that_ as a good marketing drool. We had "redundant" equipment and took the broken one off-line to work on it. [snip]
As soon as you do liquid cooling the price goes up an order of magnitude.
This is as simple as that.
Be interesting to know where that came from. Particularly when you consider the "liquid-cooled" versus "can't do it" costs.
My take is that the real answer is to move from heavy, sticky electrons to photons; the trick is to get them to interact in useful ways :)
Had your finger on an operating LASER lately?