[powerbroker]

Model X Owners Manual October 2020 (2020.44) manual, page 53 -- and the corresponding page in the Model S Owners Manual. Tesla changed the operation of their voice command button around December of 2019. The manual describes two ways to signal a complete command has been vocalized -- but only one truly works. Since the 'update notes' are extremely sparse, there was never a hint in the car's instrument cluster explanation of the update, that Tesla had removed the protocol for invoking the voice commands.

If Tesla will 'forget' to tell you that a feature is removed, or changed, then expect similar behavior around edge conditions for FSD if it ever materializes. For example, a number of different protocols could be added, tried, removed revolving around contention at 4-way stop signs. If the update notes are silent on FSD adopted behavior, a lot of annoyance and potential hazards will be created.