So I was thinking about things I can't undertake, and one of those things is the 'dumps 2.0' which has been rolling around in the back of my mind. The TL;DR version is: sparse compressed archive format that allows folks to add/subtract changes to it random-access (including during generation).
See here:
https://www.mediawiki.org/wiki/Mentorship_programs/Possible_projects#XML_dum...
What do folks think? Workable? Nuts? Low priority? Interested?
Ariel