Those are all tech that almost everyone owns. Makes sense that mass production would reduce costs and then the cost reductions would go towards zero. For new technology that hasn't been mass produced, it's a completely different story.

But that's my point. If you're basing your society shape around adopting a technology based on it continually decreasing in price, but you only get a few decades of that behavior before saturation and then you're at the mercy of the consolidated winners... generally adoptions like this aren't reversible at the societal level. You're locking in a long-term structural change based on a short-term pricing trend.