[ The Earth will run out of hydrogen.
It will turn into helium and escape into space.
The Earth will lose mass.
It will go out of its orbit.
Everything will die.
Stop fusion now. ]
The sun would have burned out, turned into a white dwarf and then cooled into a black dwarf BEFORE THAT could ever HAPPEN...
Several TRILLION YEARS!
That is a very short time compared to how long the sarcasm of his post will endure.