I first noticed this with the DA7700 GS rear derailleur.

No doubt there’s math involved. A lot of pros are using larger aftermarket pulleys on the RDs, and the Wolftooth Roadlink is now being copied by Wheels Mfg and of course, the Chinese fabricators.

I like the Roadlink for the extra clearance.

I’m wondering if the larger pulleys increase chain wrap, and would the combination of both sort of equal a longer cage RD?

At my level, performance is not an issue, but it’s interesting.