So, we (u-he) are currently in the process of figuring out how to do this reliably from VST2 to VST3. It's working well with NI and Steinberg, but more host developers need to support it.
Likewise, a similar thing is absolutely possible with CLAP. There is a draft (= unfinished) extension that makes possible the conversion of project saved settings from one plug-in to another, between different versions of the same plug-in or between different formats of the same plug-in, or any combination thereof.
I think this will need more discussion, but at some point it'll just work.