Is it possible to run raytraced shadows and raytraced AO at half res?

Very simple question. Raytraced shadows do look very, very good with 1 SPP and Denoise active, but I can’t find any way to further reduce quality and reduce cost. I would expect that they would still look quite good at half res, while having significantly better performance then. Is that possible? For raytraced GI, there is r.RayTracing.GlobalIllumination.ScreenPercentage, and for raytraced reflections there is r.RayTracing.Reflections.ScreenPercentage, but an equivalent setting does not seem to exist for RT shadows or RTAO.

If this isn’t currently possible, is adding such a setting maybe something that could be considered as a feature for 4.24?