Some of his work does seem to break down when it comes to Closed End Funds and perhaps even things like ARR.
I believe I disagree with that. As I remember, he is an advocate of mean reversion. ARR was set up to take advantage of an artificial interest rate environment. I'm thinking Malkiel would not approve of an investment in such a security. Interest rates will revert closer to a historic mean once the Fed eases off, eliminating the environment that ARR was set up to exploit.
As an aside, I have noticed that Malkiel's name is taken in vain quite frequently by a couple of the more notorious IRPs who have been touting QASP, among others, on the penny panic boards of late.