Neither the Voyager nor Pioneer spacecraft will reach the nearest stars in any meaningful timeframe. Here's why:

* Vast distances: The nearest stars are light-years away, meaning it takes light, traveling at the fastest speed possible, years to reach them.

* Slow speeds: The Voyager and Pioneer spacecraft are traveling at incredibly high speeds compared to everyday objects, but they are still moving much slower than the speed of light.

* Proxima Centauri: The closest star to our Sun is Proxima Centauri, about 4.24 light-years away. Even Voyager 1, the fastest of the spacecraft, would take tens of thousands of years to reach it.

Here's a simplified comparison:

* Speed of light: ~300,000 kilometers per second

* Voyager 1 speed: ~17 kilometers per second

* Distance to Proxima Centauri: 4.24 light-years

Conclusion: While the Voyager and Pioneer spacecraft are remarkable for their longevity and the vast distances they've traveled, they are simply too slow to reach the nearest stars within any timeframe we can realistically comprehend.