More information on JRiver’s implementation here.
They acknowledge that going all of the way would require room measurements. That doesn’t mean that there is nothing useful about just implementing curves based on generalized perceptual measurements.
The main barrier to doing this in Roon is that Roon does not have an internal volume control–in our architecture, volume is always endpoint based. So while you could easily do a perceptual EQ (even in PEQ/Convolution features today), getting it to change with volume would be a bit trickier.