[WorldMaker]

Technically Java has both `final` and `sealed`, and the distinction between the two is complicated, but `sealed` is the more powerful/capable/adjustable of the two. But the rest of your point stands and it does seem useful that C++ is paying more attention to the large ecosystems of its descendant languages and other relatives.

[throwaway2037]

Holy shit: I stand corrected about sealed keyword in Java! It was added in Java 17. <Hat tip>