iPhone 7 lets your neighbors know if you are home or out (opens in new tab)

That just looks like a bullshit justification for having a clickbait title. It's not like this title will make Apple pay any more attention to the issue. All it does is try to elicit pageviews from other people, while simultaneously misleading them (because the title implies it's a problem unique to iPhone 7, and not everybody is going to read the whole article).

Also possibly because, if it is associated with a wifi network, then it's already sending packets with its MAC address, so there's not much point in randomizing some of the packets.

In addition to those who whitelist based on MAC address, some networks also assign "static IPs" via DHCP based on the MAC address.

They might choose a different MAC for each network, but surely for a given network they use the same one? Many people use MACs for securing access points and a continuously changing MAC would break that.

Your neighbour would be using some sort of correlation to work out the MAC anyway, so all they'll need is that it doesn't change over time for your access point.

> Your neighbor's wifi scale can't see your car[...]

Don't be so sure: http://people.csail.mit.edu/fadel/wivi/