Likely, as you read this, the Cassini probe is beginning (or, has ended, depending) it’s final portion of its mission, diving into the atmosphere of Saturn.
Just shy of 20 years….and everything (mostly) still works. Pretty good engineering for a VERY harsh environment.
And, despite the protests, it hasn’t polluted the earth with Plutonium 238.
Instead, it has increased our knowledge about our solar system immensely.