All major OSes support snapshotting, and it's not a panacea on any of them.

Ok, you can "easily", but how quickly can you revert to a snapshot? I would guess creating a snapshot for each turn change with an LLM become too burdensome to allow you to iterate quickly.

For the vast majority, this won't be an issue.

This is essentially a UI on top of Claude Code, which supports running in a sandbox on macOS.