don't have the juice to pop the bubble
I don't know.
Depends on a lot of different factors.
Factors that nobody can know because they are further away than anything ever made and tracked.
Is there a turbulence where the Sun's bow shock meets outer space?
You can't 'see' wind with a telescope, you can only see the affect of the wind upon things.
The craft are moving in a directional line at great speed (compared to us) but who knows if there is turbulence out there that will affect the crafts speed or direction?
It may not even be wind. It might be a gravitational eddy.
The heliosheath might have wind too. The heliopause may be a boundary that makes the craft bounce back.
Nobody knows. The craft could reach the heliopause and disintegrate or crash up against it.
The heliosheath is oblong. It is smaller at the leading edge than the trailing edge. This indicates a force causing the distortion.
The solar system is plowing thru outer space.
If there were no force against the heliopause it would be round.
Just like the Earth's magnetosphere is bent back from the solar wind.
However, even in Earth's close proximity to the Sun, our space craft can penetrate the Earth's bow shock so anything is possible.
What is truly awesome is that atoms have a similar barrier. The
Coulomb barrier
There are four atomic
forces (Electromagnetic, Strong, Weak, and Gravity)
The Universe is chaotic but it has uniformity in its chaotic systems.
Uniformity that transfers with relativity.
Our civilized science uses chaos to describe the forces we do not understand. Its possible that the Universe is only chaotic when pondered in ignorance of the big picture which we cannot see.
If that uniformity transfers from atomic to cosmic relativity, there is a possibility that what we see as megastructures could be microscopic structures of a larger, non-focused, non-relative structure (We call the Universe).
Dr. Suess' Horton Hears A Who explored this concept.
There is evidence to the contrary because we witness the result of collisions in deep space views.
The problem with making a conclusion from the collisions we witness is that we have no idea of the distances the colliding structures traveled or the influence range of them. They could be within the same force bubble.
It is possible that normal (to us) masses cannot penetrate the more massive structure's forces.
Our best observational data has only been tracking movement for less than 1,000 years.
The movement we have been tracking that shows collisions is tracking huge objects with massive signatures.
We can extrapolate direction and rates of movement only from the 1st observation to the most recent observation.
Any remaining calculation outside the observational period is speculation.
Nothing we have tracked in the solar system, in real time so far can be proven to have originated outside the influence of our Sun, nothing.
Which means star travel to another planet will be impossible unless we develop a means of travel that is more massive than the star system or find a different way around the structure's barrier forces.
Pretty grim for colonizing other star systems.
You send your colony ship to the nearest star and it bounces of that star's bow shock.
Then you try to return home and it bounces of the Sun's bow shock.
It gets stuck in the void between stars, forever.
There is also a possibility that a small low-mass object at a certain velocity and angle could penetrate a star's force boundaries but high mass objects cannot.
If that is the case, star travel may not be a problem.
Sorta like piercing the membrane of a cell with a needle.
If you look at the rendering video of the future collision between the Milky Way and Andromeda galaxies all the computer models show individual stars missing one another.
The collision graphics depict a fluid movement and only an impact of the super-massive black holes at their centers.
If there are separating forces at the edges of star boundaries, the Voyagers may not be massive enough to overcome those forces. Since we have never been there we can't know for sure.