the computer on voyager 2 is running for 47 years now, they might have rebooted some parts meanwhile but overall its a long time now, and if the program is free of bugs the time that program can run only depends on the durability of the hardware, protection from cosmic rays (which were afaik the problems the voyager probes faced mostly, not bugs) which could be quite long if protected from hazardous environments and maybe using optoelectronics but the point is that a bug free software can run forever only depending on hardware durability and energy supply, in any other way no humans are needed for a veery long time ;-)
wouldn’t that be the definition of stable?
the computer on voyager 2 is running for 47 years now, they might have rebooted some parts meanwhile but overall its a long time now, and if the program is free of bugs the time that program can run only depends on the durability of the hardware, protection from cosmic rays (which were afaik the problems the voyager probes faced mostly, not bugs) which could be quite long if protected from hazardous environments and maybe using optoelectronics but the point is that a bug free software can run forever only depending on hardware durability and energy supply, in any other way no humans are needed for a veery long time ;-)