Atheism persists not because it has triumphed philosophically, but because modern thought has largely abandoned metaphysical reasoning. In a culture that reduces truth to empirical data, and meaning to subjectivity, the very categories needed to evaluate theism are no longer understood, let alone applied.
I find rational atheism quietly assumes metaphysical naturalism, which itself lacks proof. Atheism here is not just "I don't know" but “only the natural exists”. That claim is not testable, not measurable, not experienceable, and not provable by science. By its own standard, it should be suspended.