I have a question:

I understand (with the aid of the image, especially), that the point is that the difference between 1080p and 720p in these transfers is less than the difference between the two resolutions for many other film transfers. This negatively impacts the benefit of switching to 1080p, especially given that work would need to begin from scratch.

Another point has been mentioned for this and other fanedits, that when SD-quality material is included, it of course sticks out and looks poorly in a 1080p production. Is this effect negated somewhat by the quality of the transfer? i.e., if the 1080p transfers are more akin to upscaled 720p, does that actually bode better for the SD material?