I keep harping on this point, if Progressives put in the effort of being a persistent voting bloc, democratic politicians would be a lot more scared of the possibility of being primaried than they are of the possibility that progressives yet again will need to be reminded how the math works on them not voting or voting third party out of spite.

This is literally how the far right captured the republican party. I sign my name in Arabic, 30 years ago that would have been an easy guess that I voted republican, along with most Latine and Asian folks. Persistent electoral projection is how the right took the party that marketed itself as the big tent for all traditional values in america and turned it into the Racist Chrisnats we deal with at present. Had the left put in the same effort over the same period of time, Bernie would be considered a party establishment leader.