I am not so sure the verdict is in regarding “mistakes” #3 and #4.

We still do not have a fully satisfying explanation of what quantum mechanics means, i.e., we still lack an interpretation of the black box results of QM in terms of a coherent and empirically testable conceptual framework that makes physical sense and is confirmed more directly.

While Einstein’s mathematical approach to achieving unity in physics (and this unity is obviously there in nature) has not borne fruit for him, string theorists, quantum mechanics, supersymmetrists, etc., it is too early to rule out the vision of Einstein and many others of a fully unified physics that applies at all scales of nature.