If by "gone" you mean dead, you are correct. You can pry the Cowboys from Jerry's cold dead hands. The only regime change happening is when Jerry passes away.
He's going to be like the Redskins owner Jack Kent Cooke, who clung to his team until the bitter end. (side note: death taxes forced the estate to sell the team to Snyder)
Statistically, at 79, Jerry has met average life expectancy, so he could go any day now.