I recently read the typical MLB starting pitcher threw 140-150 pitches per start in the 70s. It was also normal for a good pitcher to complete 25+ games per year. To be called a "seven inning pitcher" was a criticism. Now it's a consistent pitcher with a strong arm.
..............
On July 2, 1963, Juan Marichal pitched a 16-inning shutout against the Milwaukee Braves, outdueling Warren Spahn, who pitched 151/3 scoreless innings before Willie Mays won it 1-0 with a home run. Marichal threw 227 pitches; Spahn threw 201.
i would be curious to know how long a pitchers career lasted in those days.
However the problem with no pitch count is throwing until fatigue. At this point, IMO, this is too late.
I think there is a reason why MLB pitchers today average about 100 PC before being pulled.