The meta-GGA SCAN functional has been there for a while. Despite the lack of SCAN (ultrasoft/PAW) pseudopotentials, various works used it in plane-wave pseudopotential calculations with pseudopotentials generated using PBE (in particular, using VASP, such as this work and this work), and reported improvements compared to GGA.
I am wondering how much impact does the use of inconsistent pseudopotentials have, and whether the results are still reliable?
PS: I am aware that rSCAN has enabled the pseudopotential generations, and there is a recent paper proposed the r2SCAN function aiming to improve the accuracy of rSCAN. So hopefully SCAN pseudopotentials will arrive soon.