Well, when I say consumer, I mean unmanaged and less than $100 for 4-8 ports. I assumed that when gigabit over UTP was formalized in 1999, I wouldn't have to wait a quarter century to upgrade, but here we are. And to be fair, gigabit still basically does what I need.

The power usage on 10GB copper is nuts so most of the cheapest switches come with SPF cages.

I'm guessing it's less than the one or two dozen 60 watt bulbs I used to use to light my house. But yes, I've heard this for a long time - at my work we used twinax or fiber often for top of rack switching and that's one of the reasons I was told. Not sure if twinax is much less power intensive, but I do have a buddy who's using regular old coax in his house (moca or something like that) as a multi-gig backbone (still less than 10G) now and he likes it. Nowadays that I have more money, I would have run fiber alongside the cat 5/6 cable to future proof things, but I'm told terminating fiber is a technical challenge. I guess there's no free or even cheap lunch for 10G yet.