I get that but Rocket lake used more power especially with avx512. My point is intel changes the socket every two generations, they added more pins and moved from lga1200->1700 yet the dies on lga1700 are physically smaller than that of lga1200. Necessitating a new motherboard.
Although it does show they increased transistor density moving from 14 nm -> 10nm. In a smaller die area than Rocket lake, they’re able to pack in more cores and transistors. While also consuming less (or nearly the same amount of) power.
Socket pin array isn't about size alone. if anything, it has more to do with the requirements of the new architecture than anything else. Pins are used to communicate between memory, motherboard, and a number of different components, not to mention power requirements which could be different.
Basically, the "plumbing" required for Alder Lake is substantially different compared to Rocket Lake. Since the architectures are built so differently.
With AMD, they were able to use the same socket for so long, thanks to AMD already predicting what they needed with the newer architectures of Ryzen. Plus, Ryzen in and of itself, has remained very similar overall, which is a night and day difference compared to Intel.