I thought Munro's teardown was a Model S built before Dec-2021, where no horn switch ever resided according to Elon. The planned horn switch was supposed to be possible in Dec-2021 and onward.
Not to defend Elon, but almost every "lie/falsehood" is not. He's very careful about what he states. For example, the center horn quote about a year ago was:
“All cars made since November also have push center for horn – just waiting on firmware update. If you mash right side of yoke with your palm, horn will trigger”
So it might take 10 years for that firmware update, and Elon has not lied. Misleading - yes! My guess is as silly as it sounds, I bet changing the horn like this might require a complete set of new crash tests since it might affect the airbag. It's also possible that hitting the airbag many times may have turned up that the material is not strong enough to handle horn pounding. Would be nice to know what the actual hangup is. My car was made in November 2021, so doubtful I have the hardware.