There exist situations where an upgraded OS is simply not compatible with good old software. These systems may be connected to legacy hardware that cannot be easily upgraded or replaced. These systems have worked for decades and are not connected to the network. These systems often predate monumentally stupid ideas like automatic updates, embedded spyware, and software subscriptions. Rather than blindly telling everyone to upgrade it would be more useful to help maintain legacy compatibility of retro systems that you may not even understand the reasons for existing. Thank you!