In summary, we have assessed the density isobar of water and the melting temperature of ice for semi-local and hybrid functionals with vdW corrections across a range of commonly used density functionals. The outcomes, unfortunately, are not particularly pleasing, as none of the investigated functionals show good agreement with experimental density isobars. It is challenging to determine whether the inadequacy lies in the nature of the vdW correction or the specics of the density functionals, but both factors likely contribute. Also, it is important to recognize that correlation eects are inherently non-separable, as they operate at all distances and wavelengths and electronic excitations at one length-scale mix with those at other length scales. This makes it challenging to isolate vdW interactions from other contributions. Employing a damping function to truncate vdW interactions at a certain range is necessarily heuristic, and even parameter tting to an extensive dataset does not ensure accurate predictions beyond the test set or for very specic problems.