Follow the money.
In his last year, Jack Dorsey spent US$5.5B and earned US$5B with Twitter.
Elon adds $1B in debt service and loses $2B or $3B in ad revenue. He maybe saves $1B or $1.5B in staffing costs. That still leave $2B/yr. (give or take) hole to fill.
He can subsidize eternally from his own pocket … or declare Chapter 11. If he hires a CEO, it will be to steer it through bankruptcy.
and it will never be the same.