There are plenty of programs written based on the assumption that there will be tuns of memory errors. Where systems can not only detect problems automatically but try a range of solutions to fix the HW problems without intervention. But it's more a question of cost to develop vs deploy. If your sending a probe to Saturn or sending 100 million devices in the field to monitor power transmission without interruption for years you build a vary different system vs severs that can be monitored by people.

PS: Don't forget your DNA is a single program that's been running continually for over 3 BILLION years because at no point did any of your ancestors die before having offspring.