It's kind of wild to think about: we might end up collapsing our own civilization before we ever make it beyond our solar system.
At this point, I suspect the next real explorers won't be us, but probes carrying intelligent machines..our robotic descendants venturing where we can’t.
On November 13, 2026
Voyager Will Reach One Full Light-Day Away From EarthObital mechanics are a funny thing however. You see this with the complicated BepiColombo trajectory to Mercury [1] that requires multiple passes on Venus. Mercury orbits at ~48km/s (compared to Earth's 30km/s). Fun fact: the escape velocity of the Sun is 42km/s so it's easier to leave the Solar System than intercept Mercury.
One difficulty is there aren't large gas giants to slingshot or brake around.
Uranus's orbital velocity is ~6.8km/s so it's both really far and requires a ton of delta-V to slow down to intercept.
Anyway, I digress.
So Voyager 1's speed seems to be ~17km/s, I guess relative to the Sun. People talk about the time required for interplanetary (let alone interstellar) travel but we can do much better than this with relatively near-future technology.
We need a whole bunch more Earth-orbit space infrastructure and industry to do anything, really. Lower launch costs in particular. I think this future is orbital rings [2]. This would revolutionize getting stuff into orbit but also launching vehicles to other planets. Basically you accelerate on the inside of the ring at ~2G with magnetic levitation to counter the linear momentum. You can reasonably get ~15km/s with this, adding to the EArth's 30km/s ideally so even without fuel you can get to ~45km/s.
We are going to lose it before long i wonder if it will be possible to find it on a future date in theory.