Elon Musk tweeted that "If Apple integrates OpenAI at the OS level, then Apple devices will be banned at my companies. That is an unacceptable security violation." Will he follow through on this threat?

https://x.com/elonmusk/status/1800265431078551973

This will resolve YES if reliable reporting states that at least one company owned/run by Elon Musk (eg. Tesla, X, SpaceX) has banned use of Apple devices by employees, interpreted broadly. This will resolve NO if this has not occurred before 2026.

A company can still count as Musk if he leaves them before the ban occurs. This does not have any conditionality on Apple integrating with OpenAI.