The abandonment of backwards compatibility is concerning to me. Especially if the features are still on official standards or work on other browsers. Oftentimes

The abandonment of backwards compatibility is concerning to me. Especially if the features are still on official standards or work on other browsers. Oftentimes I stumble across very old websites and everything works just fine a decade or more later. I love using web archive especially. Once I came across an amazing list of old websites from the 90s, when there was a bunch of excitement around genetic algorithms. They had all sorts of little Java applets to simulate evolution of virtual organisms and pictures. A month later I wanted to show it to someone and suddenly none of them worked. Java had changed its security policies and there was no way to get them to work, that I could find.