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NASA Shuts Off Instrument on Voyager 1 to Keep Spacecraft Operating
(science.nasa.gov)
This is a most excellent place for technology news and articles.
We haven't sent anything away from the sun faster than Voyager 1. It's still the fastest.
Isn't a major challenge of trying to surpass Voyager 1 that it had extremely good conditions for slingshotting off a lot of planets?
Yes, although we have ion thrusters now, so theoretically we could use something like that to get something going very fast over a long time. A little acceleration constantly over a long time goes a long way.