The good news is that if you are using shallow clones, then you probably don’t have enough commits locally to need the commit-graph feature!
Off topic: considering you've left BitKeeper and you were one of the most active developers in user forum, what's the status of BitKeeper? Is it still developed* or it's in maintenance mode for existing commercial clients?
* yes, it's open source, but being open source and "you can add any feature yourself" doesn't imply there is a momentum behind and a kind of "directed" force to move it forward
Yes, my reply was unnecessarily disparaging. Overall this looks like a cool feature. Perhaps a stopgap solution if for those commands to just delete your cache. But then your repository will get mysteriously slower. I just need to think of this as a technology demonstration.