According to classical “evolutionary theory,” 95% of all species that ever existed are extinct. Six billion years is a long time for evolution to run its course, at least that is what the retromingent clowns calling themselves “scientists” want us to believe.
Could be. Might not be.
It’s over my pay grade.
Perhaps we couldn’t live today if some of those species didn’t
die.
We can think of some viruses that we’re glad went pretty
much extinct.