Every cell in your body is running a full blown OS fully capable of doing things that each individual cell has no need for. It sounds like this is a perfectly natural way to go about things.
DNA is the worst spaghetti code imaginable.
The design is such a hack, that it's easier to let the unit die and just create new ones every few years.
the human body can scale from 1 cell to several trillion without going down for maintenance even once all while differentiating to different functions
it can take a high level of damage and heal without needing a shutdown as well, most software crashes completely at the first exception
cells give you that highly scalable and fault tolerant system that we all want
doesn't it go down for maintenance approximately once a day?
Cattle, not pets
Five species of salamanders have similar enucleated red blood cells, but I can’t find out how long they last in comparison. https://pubmed.ncbi.nlm.nih.gov/18328681/
One theory is it’s an adaption to having unusually large genomes which would otherwise be an issue, but biology is odd so who knows.