Well, it’s still the same as Dark Souls. Engine wise, it’s the same. Someone who made models for Souls, can make models for Sekiro. The debugging tooling is the same, etc etc.

The best example of this is actually Armored Core. They used their engine again, yet the game obviously plays different than anything else they released. And yet, it’s the same techstack, the same engine and the same programmers. Nothing changed.

Compare that to the jump from Oblivion to Skyrim, the engine is no longer recognizable. The models need to be of a very different quality. Etc etc.