Those manual settings are interesting. Specifically:

-Does min shading rate affect texture maps? In my experience, no, only procedurals. A shading rate of 0.10?! Egads, this content creator has oodles of time on their hands. 

• Use displacement maps checked / Min displacement bounds 0.00 if you use displacements. What a great way to introduce holes in geometry!

Max bucket size 32 / Min Shading rate 0.10 = 10,240 micropolygons per bucket. Even without  raytracing and AO, I can only imagine how long such a render must take.

Seems to me that these settings are overkill unless doing an extreme close up.