/README.TXT: Notes on system stability: added recommendation to maintain a snapshot copy of the VM as it was at the last successful import, for fallback use if a system upgrade breaks anything. system upgrades on the snapshot VM should be disabled completely, and because this will also disable security fixes, the snapshot VM should be disconnected from the internet and all networking interfaces. (this is an unfortunate consequence of modern OSes being written in non-memory-safe languages such as C and C++.)
/README.TXT: Notes on system stability: added recommendation to maintain a snapshot copy of the VM as it was at the last successful import, for fallback use if a system upgrade breaks anything. system upgrades on the snapshot VM should be disabled completely, and because this will also disable security fixes, the snapshot VM should be disconnected from the internet and all networking interfaces. (this is an unfortunate consequence of modern OSes being written in non-memory-safe languages such as C and C++.)