And if you're one of the people who can crack a beer open with the owners of Google, then you found your right community.
However, in the general case, I don't think these count as any individuals communities. You can't rub elbows with the people maintaining Google and Facebook. You can't talk to them about issues you're having, they're not going to dynamically modify the system for special cases that are important to your community. A community is a group of people who know each other.
No, the photo is of a general computer. So most of the cooling is for the CPU and GPU.
SFP modules can get quite hot, especially if they're pushing high frequencies over copper. So you'll see some people complaining about their 10 gigabit copper SFP modules overheating. Especially on passively cooled network equipment.
Fiber optics don't get nearly as hot, and don't have overheating issues. Direct connect cables also do not get hot.
I'd much rather have all of my networking equipment with fiber optics, then copper. The trade-off is it's harder to splice your own fiber optic cable and put termination on it, the benefit is the equipment is much much cheaper, More reliable, cooler, goes further distance... A fiber optic SFP module cost about $10 for one, but a copper SFP module is like $100.