The last 50 years have been huge in science. I'm not going to try to describe the difference, but it's probably a quadrupling of our knowledge.
As far as evolution goes, any quote more than 30 years old is from someone who at the time could not possibly have known half of what's in this compilation of evidence for evolution.
And that's just addressing the age of the quotes, not their honesty.
If you were talking about computer science you might have a case. But for a supposed branch of science which is mainly done with pickaxes and shovels to have to reinvent itself every ten or twenty years is a joke.