I’ve been non-union private sector my whole working career. SS and 401K + assets + savings are my retirement.
We're in the same boat. Private sector pensions largely went the way of the dodo bird about the time we entered the professional workplace. Thanks to all the upheaval in the private sector, we've changed careers a few times and are both now in a parochial school teachers union. As of a few years ago, even that organization went to a defined contribution plan because traditional pensions, even meager ones, were unsustainable.