No, if 2016 didn’t wake them up I don’t think anything will, I’m pretty thoroughly convinced they would still be whining about Nader voters as they were being taken to the gallows by Republicans,
Everyone who can be woke already is and its just about calling out their dumb moderate ideas while they can still be stopped and primarying their people with real progressives. Democratic candidates losing to Republicans doesn’t make that any easier, if anything it just empowers moderates because the “leftist purity tests did this” narrative plays really well with low information voters.