People who seem to love free speech seem to never love it when it comes from people who work for them.<p>Going forward how Musk handle the Twitter? I see more worker discontent for Musk owned companies in the future.
I presume that all of the SpaceX employees in question are at-will employees... and criticizing the owner of your company in an open letter is not a protected activity. So, like it or not, adios.<p>Granted, if his best and brightest are all making the same complaint then he better take it to heart because firing them will destroy SpaceX for good.