Consumer electronics are designed for consumer living conditions. In many parts of the world, indoor humidity can sit over 60%, all year long. In a dry climate, you could get some significant cooling, and still be under what you'll find in my house.
Phase change based cooling, especially when combined with a natural source of low temp air (such as a large basement) can be remarkably effective. Your typical DC has much too high a power density to be able to utilize this but for a single large rig in a home it could work very well.
The humidity (in Utah) in that room was like 4%. Datacenters should be between ~45 or 60-80% humidity, depending on which source you read, to prevent electrostatic discharge. It was way cheaper than installing and running a mini-split. Plus, I NEEDED the added humidity.
