Updating priors with evidence. Standing by your beliefs seems to be praised - at least where I live.
I consider Popper as an important thinker, falsification is quite important right now for example. Why do you seem to think he's unimportant ?
The most funny thing about Popper is that I don't get the impression that he or most of the people reading him seek to falsify his theories. Often because someone, as it's philosophy the rules of falsification don't matter. Popper didn't try to study scientists and how scientists come up with new scientific findings to try to falsify his hypothesis.
From a more LW perspective Lukeprog writes:
...For centuries, philosophers wondered how we could learn what causes what. Some argued it was impossible, or possible only via experiment. [...] Then, in the 1990s,
My favorite is that people get credit for updating based on evidence.
The more common reaction is for people to get criticized (by themselves and others) for not having known the truth sooner.