All depends on the climate your in, and the insulation of your house. You can build houses which don’t need AC even in hot places by going underground or making earth ships. Yet with traditional construction and insulation in many places AC is almost required. Pretty efficient anyway, just a heat pump.
I like the idea of it; yet you can’t host private repos. I don’t want to be locked in to GitHub but as someone starting their career it’s important to show that you’re working on stuff. Hence I worry that moving away from GitHub will negatively impact my interviewing prospects.