[cfhhgtyg]

> You imply that it won't.

How? Though, I am certain that it won't grow indefinitely on earth.

> I don't see a fundamental reason why humans would stop at 8 billion

It can stop at 9 billion and still not grow indefinitely. Currently a peak of 11 billion and no more than 12 billion is estimated. As said. Because of increased living standards.

> To keep total consumption constant, avg. consumption per person needs to decrease proportionally to the increase of the number of people.

It better to decrease proportionally with a coefficient smaller than 1 and bigger than 0 than decrease consumption not at all.

> Not a real counter-argument.

Yes, it is, because it implies a logical fallacy.