What's with the halt in plastics findings for the last 40 years?
I fell into a rabbit hole and have found that since 1839, there's been developments in plastics on average just a few years apart. The biggest logged jump between discoveries is from 1965 to the 1980's. Mostly, it's between five to fifteen years for updates in this timeline;
https://en.wikipedia.org/wiki/Timeline\\\_of\\\_plastic\\\_development
But there's nothing I can find past 1988. It's 2026; I can't believe that nothing has been found in 38 years with this past frequency. What am I missing? Are my internet skills too lazy?
Tl:dr; has there been further findings with different types of plastics in the last 40 or so years?