I disagree. I have a lot of old high school friends that are lefties. I don't keep regular contact with them as often as recent years, but I do see their social media accounts. A lot of them aren't as rabid regarding certain issues (e.g. trannies), but they do still vote blue and were all gathered together in a discord call on election night. Although, hey believe that the democrats in office are shit and don't push the economic policies they'd like (very socialist stuff).

I think the reality is that it's not as big of a movement these days and majority of the blue voters were centrists that don't really get too involved in politics. The cities I'm nearby definitely have their fair share of blue voters but it's not like TV makes it out to be.