Over the years I've considered various "pitching schemes" for managing innings and workloads, etc. The wild card in these constructs is always the "super ace" like Skubal and Skenes who you want on the mound as much as possible short of their arms falling off, hello Sandy Koufax. But over the years your SuperAce workload expectation has gone from 300 innings, to 250 innings to 200 innings in our current environment. Over the last 3 years only 12 pitchers have reached the 200 inning plateau.
So which is more impactful to team wins, a Skubal who starts 33-34 times in a 5-man rotation and pitches 200 innings, or a Skubal who starts 40-41 games in a 4-man rotation and pitches 200 innings? If you don't have a SuperAce (or 2) then you worry less about maximizing your main guys.
It's a good discussion and timely especially today with some teams talking a 6-man rotation. I think the 4-man rotation deserves some serious consideration.