The changes that drive the reduction in lifespan of modern electronics is a very good topic, however it is an obvious issue that is taken into account in nuclea

The changes that drive the reduction in lifespan of modern electronics is a very good topic, however it is an obvious issue that is taken into account in nuclear designs. The latest VVER-TOI has a life expectancy of 60 years, upgradeable to 100 years. It is possible that they have to change the CPUs every 10 years as routine maintenance though. I don't think they are full analog nowadays.