I realize this is a sought after feature, as well as this thread offering a workaround but to have a bounce “in place” would literally mean that in the case of audio data, that revisions of rendered material would need to be kept, i.e. in the Pool and subsequently stored along with settings to revert.
Freeze kind of does this for VST instruments (and effects) but is arguably very clunky and to my understanding could never serve as the basis for such a requested feature.
This brings to mind the lanes function in Cubase and whether or not there is the ability to handle this type of situation, for both audio and MIDI data.