Thing is, computers (originally) were strictly programmable tools to do a job. Once its code was programmed, debugged, and well-tested, it remained a tool to do the job. If the computer isn’t connected to a network that is somehow itself connected to public access (ie: the Internet or unauthorized human physical control), what we consider “security” and “feature obsolesence” aren’t issues… if the computer and its code still operate properly, they continue to serve the purpose as a tool for which the code was originally intended.
Not all things in life are governed by marketing hype and feature-creep. I still use a framing hammer that once belonged to my grandfather… it may not have a “modern” shock-absorbing cushion or a fiberglass handle or even a pneumatic driving mechanism, but it still does a nice job pounding nails.
