[KirinDave]

This is one place where you don't need to be too concerned about tech giants. They're massively invested in reducing the cost of their datacenters by making them:

1. Less wasteful of electricity. This means less cooling and a relentless drive to push manufacturers to produce more performance for a given watt-hour, which also generally means less waste heat.

2. Less reliant on active cooling: this means that their designs can use ambient air until the air outside reaches a certain temperature. It also means a lot less wasted hardware in the event of an active failure.

3. Less enclosed space: they want to reduce the physical footprint whenever possible because every square foot of enclosed space is maintenance even if you don't have to actively climate control it.

Google, Microsoft and Apple all share these goals, and as such are quite active in the space. Lots of data on youtube for the casual inspection.