TL;DR of the post, generated automatically.

OP has been studying Ghibli-style looks in Blender, built from Geometry Nodes and the new Light nodes.

• Setup: No bump maps or Principled BSDF, according to OP.
• Why it matters: OP says the new Light nodes allow custom and stylized shader options.
• Images: Two Ghibli Style renders at 2560×1440 and a clay render at 2141×1344.

Ghibli-style with no Principled BSDF in sight. Go figure.