Based on this discussion, I got curious about ranking the top "bigs" in the league and where Porzingis ranks. The definition of "big" can be somewhat subjective but for my analysis, I took only players that are clearly a PF or a C as their natural position, no swings or any other marginal interpretation of position. To get the list, I went to traditional player stats for 2022-23 regular season. I filtered for GP>50 and REB>8. Then I ranked by PTS/GM. The resulting list was not perfect, it included Doncic, Tatum, and LeBron, who I sorted out as not bigs, but the remaining 30 or so I felt were clearly bigs. Here is the list or the top 10 (again, ranked on scoring):
Embiid
Giannis
Davis
Markkanen
Randle
Jokic
Porzingis
Adebayo
Sabonis
Ayton
I went through the next 11-25 or so to pick outliers that may warrant making a top 15. Towns didn't make the sort due to games. Siakam only had 7.8 rebs. Capela and Gobert don't score like some of the others but excel in defense and rebounding. And I added Vucevic as he was 11th by the original sort and I didn't see anyone else who would clearly bump him. So the remaining 5 are:
Vucevic
Towns
Siakam
Gobert
Capela
I think that is a fair top 15 list of bigs. Most teams still start 2 bigs, but not all. The main question is, where does Porzingis rank on this list. I think of it as who would I rather have on the Celtics in place of Porzingis for the next 1-3 season. Durability is a factor to consider. Contract can be kept out of it (most of these have pretty big contracts anyway). I know Zion is a consideration but I kept him out, he can be considered though if you would rather have him for the next 1-3 seasons than Porzingis.
My list of for sure better are:
Embiid
Giannis
Jokic
That is it. Then there is a list of "about the same":
Davis
Markkanen
Towns
Adebayo
(Zion)
I have Porzingis in the 4-8 range of all bigs. Maybe 5-10. That essentially means we are going to have the best big on the floor most of the time, maybe as much as 25 of 30. Durability is the biggest concern with Porzingis but many of these top bigs have that concern also. Jokic is pretty amazing in that regard. He has been extremely durable, part of why he is really the #1 big of all of them.