My old 1080 Ti now sits inside a 4U rackmount server. It's an EVGA SC2 HYBRID version and I am still amazed that the AIO cooler hasn't failed yet or leaked everywhere. One of the best things I've purchased in retrospect since it was my main GPU up until the middle of 2025, even though at the time in 2017 I felt the price of 1.5k NZD was extreme.
I have a similar plan for my 4090 once it's gaming days are over. I'll retire it into my homelab (I specifically massively overspecced the power supply in anticipation of this) and run whatever local AI models exist in 2028-2029 which can fit on it.