No disagreement, although the only zoom on the Mavic 3 is digital which can be done just as easily in post.
For a still photographer, the camera and the flight time are most relevant. The 20MP stills are the same size as those on the Mavic 3 so...
If you're going to sell it, I wouldn't touch the software update mechanism at this point and maybe let the new buyer decide if they want it or not. there's no benefit to you to perform the update that I am aware of.