It's absolutely delightful to see concepts come many full circles like this. I remember the Cray-2 cooling towers as the most futuristic computer in the world e

It's absolutely delightful to see concepts come many full circles like this. I remember the Cray-2 cooling towers as the most futuristic computer in the world even in the 90s, and it inspired me to sink my old system in mineral oil in the early 00s. I did the research and found the stuff in the Cray towers (Fluorinert) was $many/gallon, and the smallest volume they sold it was something like 55gal drums. Mineral oil was $cheap enough, also inert, and so I got a 5 gallon tub of the stuff. I built a plexiglass case, sealed it with silicone caulk, overclocked the CPU, hooked up an industrial-strength aquarium circulation pump and... rapidly went nowhere with a disgusting, oily motherboard. And a ridiculously heavy case filled with, essentially, hazmat. It was a terrible idea back then and still seems bad today. I'll be interested to see what the next cycle brings, if it's back to spot cooling or if immersion really is the way of the future.