the machine learning stuff is cool, but it's important not to discount the apparently pretty manual labour still involved in the virtual unwrapping:
> Early in the summer, a small team of annotators (the “segmentation team”) joined our effort. They began mapping the 3D structure of the scroll using tools initially built by EduceLab and improved by our community. By July we had segmented and “virtually flattened” hundreds of cm2 of papyrus.
So, it sounds like it was about a month or two of work, for a single scroll. Although, it probably could be partially or fully automated too, with some effort. Already they developed some tools to help, and I guess it's the kind of task that gets easier after you do it the first time.