Hello,
we acknowledge the overwhelming support of this feature request and we have discussed it. We do want to make some improvements (e.g. in the way glass/transparent material is displayed) but when it comes to the more "advanced" things, we do not know when Maxon is set to release a viewport API, which we desperately need to start working on this. We hope that this update comes with S24, but nothing's for sure.
I hope this response at least satisfies your request.
Thanks,
Jan