[welzel]

I wonder if a "modern" probe from 2024 could ever have a similar lifespan.

With systems hundred times more complex and build by a NASA that is a fraction of what it was 50 years ago, i guess a modern day Voyager will not even make it to the edge, let alone continue to function.

[rtkwe]

We'll have a chance to see with New Horizons. It's one of the five craft to ever be put on a solar escape trajectory.