At 45 years old (1977) the spacecraft has far exceeded expectations. And, amazingly, it still is functioning -- keeping its antenna pointed towards earth.
It's been an incredible feat and device.
From the link
NASA said on Wednesday that while the probe is still operating properly, readouts from its attitude articulation and control system — AACS for short — don't seem to match the spacecraft's movements and orientation, suggesting the craft is confused about its location in space. The AACS is essential for Voyager to send NASA data about its surrounding interstellar environment as it keeps the craft's antenna pointing right at our planet.
A nickel says Voyager 1’s interstellar electromagnetic environment is interfering with its AACS.
Another nickel says its gravitational environment is about 39 orders of magnitude weaker than its electromagnetic environment.
Of course NASA engineers don’t understand.