I guess that might explain why they had it at such a low temperature (way to low I'd say), as they wanted to make a point about the lower energy consumption? If you wanted it hotter, then it might not actually save energy at all potentially?
Extraction of flavor etc from coffee grounds changes based on the water temperature. You can easily experiment with this by taking some coffee grounds and trying to brew with various temperatures, and noticing what flavors you get out.
There's a reason cold-brew needs hours and hours to extract a good coffee flavor while regular espresso or pourover is done in a matter of minutes.
Also, please see the community guides. Treat comments in good faith (i.e. the strongest interpretation of their comment) and try to encourage productive conversations. IMO just quoting is degenerative to the conversation. Quote, but say more. Put your actual voice in the comment