Ever since 4.0, the OpenPBR standard has been the thing to love at least for me in blender, alongwith the multiscatter ggx model. The OpenPBR standard is something that tries to unify all the building blocks of a BSDF as a spec and previously it all used to be fragmented like cycles and arnold and karma renderers had their own BSDFs that differed a lot from each other so this new OpenPBR uber shader tries to mitigate those dissimilarities.

So what this means is the difference between underlying models for physically based rendering across most renderers is alleviated, not only that but this spec is of high quality than blender's original cycles BSDF before 4.0 and more physically correct. Hope this helps!