The popular pseudo-left claim that Unions were having "their moment"

More a consequence of existing unions successfully bargaining for better wages/working conditions, and a few early organizing successes (Starbucks, Amazon), than a universal rise in union membership. It had far less to do with Biden than liberals would like you to believe. The post-COVID labor pool compression has offered organizers more leverage than they've enjoyed in my lifetime.

But Unions are so emaciated after decades of evisceration that overall shifts in the employment pool don't significantly affect their membership.