This makes you happy until it fails. Windows, Mac OS X and even real-world Linux write state information onto the FS. (Hibernate etc.) If stuff fails, you ma

This makes you happy until it fails. Windows, Mac OS X and even real-world Linux write state information onto the FS. (Hibernate etc.) If stuff fails, you may not be able to boot into your "native Installation" anymore. Another thing is evolving features, Windows is particularly good at this: more and more features are added to the FS, if you don't keep mini VM and native Installation in sync, weird stuff could happen. I use dual boot since many years, but I have stopped sharing partitions completely. If I need interoperability I use the Cloud, USB sticks and "normal VMs". It's fool-proof, safe and low maintenance.