We've seen Trump dismiss people before, sure, but we've known for years that the administration has been pre-vetting people as Trump loyalists[3], planning who will become head of what department and why, which executive orders to move on right at the start of the presidency. This suggests Musk is not a casual appointment and advisers will advise Trump not to dismiss him casually.
And, apart from literal death, what does he have to fear with hundreds of billions and two companies to fall back on? For all my criticism I am not expecting Trump to pull a full Putin, confiscate X, SpaceX and Tesla and send Musk to Camp Guantanmo or have him die by falling out a window. Are you?
[1] https://www.wsj.com/politics/elections/elon-musk-has-said-he...
[2] https://www.bbc.co.uk/news/technology-38315682
[3] this was 2023: https://www.axios.com/2023/11/13/trump-loyalists-2024-presid... "Hundreds of people are spending tens of millions of dollars to install a pre-vetted, pro-Trump army of up to 54,000 loyalists across government to rip off the restraints imposed on the previous 46 presidents. The screening for ready-to-serve loyalists has already begun, driven in part by artificial intelligence from tech giant Oracle, contracted for the project."
Not having those anymore. With the new emergency powers Trump has claimed, he could shut down every company of Musk’s except X. Depending on how bad the breakup is, that could be on the table. Live by the sword, die by the sword.
Just thinking of Musk's behaviour, if he felt that was a real possibility wouldn't he be walking on eggshells? Instead he acts like he feels untouchable.