With Blender 4.0 comes some welcome changes to the Principled BSDF, and https://physicallybased.info is now updated to reflect those changes when you choose Blender from the Engine dropdown.
IOR is now controlling both reflection and refraction, and Specular Tint is working as expected for metals. You can also find values for Subsurface Radius for select materials.
@mcc I've encountered some crashes on 4.0 beta, so I can't recommend it for anything else than testing. Full version of 4.0 is coming in just a few weeks though.
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