What I didn’t see discussed was the possibility of the reverse causation. People that have more diseases spend less time outside and therefore have lower levels of vitamin D.
Would explain why vitamin D supplements don’t seem to work in the studies mentioned in the article.
> but it doesn't make sense to allow multiple devices per number anyway
Why not? This is a useful behavior that is currently emulated by forwarding calls to laptops and tablets with the same account when the devices are on the same Wi-Fi. You could get rid of the Wi-Fi requirement if those devices all simply had an eSIM with the same number.