I think that, fortunately, there won’t be an excessive number of cases in need of this new feature. Basically, only those plugins that changed VST IDs in the transition from VST2 to VST3 (PSP Audio, Softube…), or those that usually change version number and ID on every major update (Native Instruments and Izotope come to my mind).
A different issue is what we will do with those plugins that won’t be updated to VST3 once Cubase ceases supporting VST2. There are already several options that we discussed here: