I'm looking at starting to run any%, but I hardly ever get the opportunity to sit down for 4+ hours. If I can prove that the same save file was used, and that I hadn't savescummed the second segment, would that be allowed? I was thinking something like correlating the autosave date between segments. The autosave would be overwritten if I was to continue further. I'm in no rush if this is something that needs to be discussed

The boards are single segment boards so any form of segmented runs would not be allow. The advantage of running segmented , even if you only try each segment once, is massive and various.

This is an open and shut no because of the advantages there are. Though I personally am a fan of segmented runs so would not oppose separate categories if the demand and competition is there.