How does it break the semantics? It "Compatibibly interoperates" according to the JSR! I don't think wanting not-null is going to be fleeting, but I'm sure wit

How does it break the semantics? It "Compatibibly interoperates" according to the JSR! I don't think wanting not-null is going to be fleeting, but I'm sure with Java's long loooong 30 year history there have to be other "in vogue trends" that have left tech debt... Can you point to any?