Sure. So back to your previous point, when you develop the source CinemaDNG footage you do not deal with any transitions, are not cutting it, and do not need it

Sure. So back to your previous point, when you develop the source CinemaDNG footage you do not deal with any transitions, are not cutting it, and do not need it to be real-time. It is simply a bunch of stills, which you process into a straightforward sequence of pre-graded PNGs in your desired colour space that you are free to edit together however you like at blazing fast speeds. Unless you go crazy on some very specific transitions (and who uses transitions anyway in film these days) that don’t work in final colour space, you do not need raw footage at edit time, do you? I guess I know the answer, if you work in this industry then punching in/out or stabilizing in post is a common requirement and you mentioned some tools can mess up even at resizing stage.