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AWS crash causes $2,000 Smart Beds to overheat and get stuck upright
(www.dexerto.com)
This is a most excellent place for technology news and articles.
So in my case (I didn't want to, but not my choice, but at least it was cheap and without subscription at the time), it was about the water cooling/warming. It's really nice and essentially inaudible.
I think Chilipad is a brand that does it without the online bullshit, though I didn't get to try that.
None of this should ever require an internet connection, and it's abundantly clear that's an anti-consumer hostile forced behavior Eight Sleep did.