It’s basically wondering why your sales aren’t going up when there are still customers to be found. Even if you saturate a market, new people are born every day, at a greater rate than they die, so one would assume you grow or fade, unless customers just like… stop buying things in a category for some reason (maybe a superior category was invented?)

The problem isn’t infinite growth in a still-growing world, it’s exactly what you posted here: Growth at all costs. The pendulum has swung too hard in favor of growth over stability. This is great for shareholders (read:everyone in America who wants to realistically retire one day) but bad for workers (read: everyone in America, regardless of whether or not they want to retire one day).

Late-stage capitalism is addicted to ever-increasing quantities of money.

It'd be nice to imagine our society surviving our ruling classes' addiction, but I would not bet on that.

(You might read some essays by recovered addicts to get a sense of the monomania of it, and why they wouldn't about things like "mature" and "stable".)