> Yes; in several billion years, e.g: [...]
You just invented the "several billion years" part. I absolutely, unequivocally believe the premise of the article we're discussing, that space-loving billionaires (like Elon Musk) and their acolytes believe that the earth is doomed to failure in the short term and that the only way for humanity to survive is to become multi-planetary. If you think Elon Musk is operating on several billion year time horizons, I have a spaceship to sell you.
Yes; in several billion years, e.g. https://twitter.com/elonmusk/status/1482552643343904770
"There is a [100%] chance of all species extinction due to expansion of the sun, unless humanity makes life multiplanetary"
Do you disagree with this assessment? Either way, it is irrelevant to the claim that "billionaires [are] planning to move humanity to Mars in the near future"