The theory now is within 30 years male humans will basically become eunuchs.
Microplastics has basically sailed, there's no stopping it now. No other material can replace it in the current economy. Ashphalt = plastic, Tires = plastic. America = roads everywhere.
It is looking like we're headed for collapse, and brutal feudalism. Tp4 is learning how to make barrels from handtools, because computers probably won't do much in the future. We'll all live in slums like India.