Yes, the old guard are passing away. To my knowledge, Father Leo Carley is the last remaining Traditional priest ordained under Pius XII (1957). AND he's still active, continuing to offer daily Mass for his large chapel. I've been meaning to go visit him and write up a biography so that knowledge of his life and work is not lost to posterity. Father is one of the most low-profile Trad priests you'll ever find. He just wants to take care of the faithful. He has zero online footprint despite being a Traditional priest for nearly 60 years.