It's legitimately fascinating to see the rise of pattern matching, to the point that even Java will have it [1]! Combined with lambdas, this is a different language than the Java 1.5 that I first learned. If you would have told me that this would be valid Java code:

    static void testStringOrNull(Object o) {
        switch (o) {
            case null, String s -> System.out.println("String: " + s);
        }
    }

I would never have believed you. And while it's not Elixir-level pattern matching, it's not toothless either. This is valid pattern matching code too:

    static void testTriangle(Shape s) {
        switch (s) {
            case Triangle t && (t.calculateArea() > 100) ->
                System.out.println("Large triangle");
            default ->
                System.out.println("A shape, possibly a small triangle");
        }
    }

[1]: https://openjdk.java.net/jeps/420