He would have to fire every last one of those types or else face constant passive-aggressive sabotage from them, the corporate version of the deep state.
That’s not exactly a huge problem right now. Twitter is overstaffed at current.
I’m not sure there would be any left to fire - I think they’d quit or commit suicide before they’d work for Musk. The rest will be quivering puddles of mental jello. The employees needed a day of rest at the mere possibility of Musk being on the Board. Regardless of how many are or are not left, I think he would clean house, big time - some will try to stay to be saboteurs & he’s not going to spend that much money to have nasty woke wienies sink the ship.