system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 : how are the various parts of voyager 1 and 2 still working despite them not undergoing regular maintenance , especially even after 45 years?
gpt
They’re designed to be durable, not cheap.  Most earth-based hardware can cut a lot of cost by using vastly cheaper consumable parts.

They’re also in deep space - an environment that has certain challenges from radiation and low pressure, but also has some key benefits in zero moisture or oxidizing gases.

The Voyager probe would have been obliterated by corrosion on Earth by now.

With few moving parts and no threat of corrosion, space probes have a good history of running until their power supplies go dead.