> Also, they claim this provides assistance in meeting regulatory standards, but never saw much more than assertions on that.
This is probably in reference to this old message by Richard D. Hipp [1]:
"Fossil, in contrast, is designed to remember everything. Fossil was specifically designed to support the DO-178B inspired development process used by SQLite, with few developers and a complete and immutable audit trail for all inputs."
DO-178B, now superseded by DO-178C [2], was an FAA standard used for the approval of commercial software-based aerospace systems.
[1] https://www.mail-archive.com/fossil-users@lists.fossil-scm.o...