I have two working hypotheses, one is optimistic and the other pessimistic.

The optimistic assessment is related to the fact that antiness has been very closely linked to the economic forces of industrialization, urbanization, globalization and universal adult workforce participation. Those forces are losing steam currently. Industrialization is already reverting; globalization is in danger; urbanization is still technically on the rise, but cities themselves are growing so large that they're also themselves growing into sets of semi isolated sub cities, rather than a single conglomerate; and the workforce is shrinking: youths are studying more, seniors are leaving earlier, unemployment in all demographics tends to increase, and social programs for different groups further reduce the workforce. As a consequence, the sort of society with which antiness appeared is going to end soon. Under the supposition that this society is necessary for antiness, then antiness is also nearing its expiry date.