We all wish Cycles could do that. As far as I understand, the techniques Luxcore uses for caustics are completely incompatible with Cycles and would require the renderer to be largely re-written.
However, there is some developpement happening right now for some different caustics techniques. The newer experimental builds of Blender have MNEE caustics, which allow transparent shadows to have refractive caustics (tough it has to be activated on individual objects).