Like the title says.
I know there’s been feature requests for batch processing with plugin chains and of course that would be fine, even if batch processing would be a wider scope.
But to have the possibility to save my chains of thoroughly tweaked VST3 plugins as presets would be a very good beginning, and I believe not too complicated to implement. The other Process menu items have Preset possibilities.
One example for the use of this would be while remastering an album I have combined 4-5 plugins to adjust some evil boominess of an acoustic guitar stem from one of the album tracks, it would be nice to be able to use that same chain/preset on the acoustic guitar on all the tracks.