This just sounds to me like "frequent auto-commits" with less trust in git. git can handle frequent auto-commits just fine. If you want to "rollup" frequent auto-commits into "cleaner" top-level commits but also keep all the point-in-time "conversation" of your auto-commits, then `git merge --no-ff` from time to time and use tools like `--first-parent` to focus in on "top-level" commits over "conversation" commits.

The git backend already has a ton of "delta DB optimizations" (in git packs and other tools) and it's really just the git frontend that needs a little massaging (`--first-parent`, primarily) and the vast world of "subway-diagram-first/only" Git UIs that should have more "drill down" `--first-parent` counterparts simply because so many people find the subway diagrams ugly/confusing/distasteful.