Any local variable used but not declared in an inner class must be declared final.

Mentioned here

I compiled this code without using the final keyword , still works . But in section 8.1.3 they have specified that we need to use final.
Did this use to be the case in “older days” ? If so , what was the motivation behind this?

class Outer {
   
    static void classMethod() {
        final int l = 200; // do we need final here?
        class LocalInStaticContext {
            int m = l;  // OK
        }
    }
   
}