Child malnutrition rates in India are worse than in some parts of sub-Saharan Africa, actually: https://www.deccanherald.com/state/top-karnataka-stories/mal...

Impressive GDP growth aside, persistent malnutrition suggests that for huge chunks of the Indian population (a shocking _seventy_ percent of women are anemic), something's not working. Who cares what GDP growth is? What's it really measuring if people still aren't getting enough to eat?

The point is that developed world has stalled. Which is probably true on some measures but we do not know why. There should be slower but incremental improvement as there is room for that still. A plenty of room in fact.

Life expectancy is still gaining though and flattening. That is the main variable encompassing almost everything. Including normalized per income is flattening. Income per capita has flattened somewhat, but it might be a natural sigmoid the China, Russia and such have yet to reach. So that's about it.