For example, `git remote -v` would show: `secure-s3 /mnt/fuse/rclone/secure-s3/git/$REPO.git`
I think concurrency is a problem with file-based remotes but for one person keeping a desktop and laptop in sync it is much simpler than running a VPS.
Also handy if you're running an agent in a container on the local fs. Set up a local clone, contain the agent to that repo folder and have it hack away on that. Later, you step out of the container and do the syncing. You can't use worktrees in this situations.
Bare repos are also pretty cool. You can clone the git mailing list as a bare repo and search for threads there instead of setting up an mbox (same for the kernel obviously)