Exponential growth can’t last forever, and I do worry about what will happen when the gravy train stops. Maybe we can figure out interstellar travel before it does so the limiting factor becomes “the galaxy” rather than “our planet”.
This is a non sequitur. If the economy contracts and 99% of these businesses go under, 1% may well remain (“they exist…”) but that does not mean that all is well (“they will be fine”).
> They aren't so beholden to the wider economy as their customer base is local
The local economy in most of America is highly coupled with larger corporations. Either the large corporations are the major employers or the large corporations are the major customers for the area’s employers. Even if it’s not that, everything is tightly coupled to the banking system, as we learned in 2008.
In other words, the last time everyone got worked up over this, the trend reversed itself too hard within a few decades, and then reversed itself again. Meanwhile, over half a century after the "decline" started, we have over twice as many people as we had when it started, and the earliest projections for when growth will stop is another half century from now. I think there are a lot bigger problems we'll need to reckon with before then, and if we manage to remain stable by then, it seems like we have good precedent for reversing it fairly quickly.