"when you turn the key to “off”"
More and more cars no longer have a key to turn to 'off', just keyless ignition (hopefully) secured by encrypted key on the remote fob. In fact there's probably no high-end car sold in the last 3-5 years or mid-level car in the last 1-2 years that still has a physical ignition except as backup when the remote fails.
So there is no physical switch and SOME electronics have to be always-on