No, there is always a programmer, a sysadmin or an operator who is in control of a program. Software cannot deploy and maintain themselves.
It's possible to completely cut access to a system, for example you lose the only SSH key. It would continue to run and service users, but it is inoperable on an operational point of view.
It's possible to completely cut access to a system, for example you lose the only SSH key. It would continue to run and service users, but it is inoperable on an operational point of view.