Unionization never happened.
In the 80s a well known aviation components manufacturing company moved where I am from South Bend Indiana to escape collective bargaining units to have non union employees......they hired all new blue collar workers including myself and made it very clear if the workers attempted to unionize they would relocate again no problem......after 5 years some idiot employees decided to challenge that edict.....2 years later they consolidated our plant with another facility in N.C.
IMO unions are an outdated concept that can’t survive in an ever increasingly competitive world......auto makers are a great example of that.
That is exactly what Atwater Kent did with his radio business.
The workers unionized, he gave the workers a pay raise, but told them if the union interfered with his business at all, he would close it.
They did and he did.