Very true, but be aware; I've had this one nasty issue where some of the .pyc files got corrupted. While the file system is read-only, this could never happen (I believe the decision to make the FS to read-only was not just to bug the miners, but to eliminate some of the issues that could happen). It's not that big of a work to manually switch between rw&ro when needed and honestly believe that is the safer route.