[spacebanana7]

> Population cannot grow forever,

I think the best case long term scenario is population stability.

> We need to start focusing on figures per capita

Even per capita figures are distorted by the fact that naturally declining populations imply ageing populations. So even in a technologically improving society where output per worker was increasing, per capita figures could decrease.

To be clear I don't think Japanification is inherently bad - individual quality of life can still improve despite unflattering macroeconomic numbers. But it still involves tradeoffs.