I don't. I just asked to do some research instead of indulging in wild speculation.

You are. https://en.wikipedia.org/wiki/Argument_from_authority

  An argument from authority[a] is a form of argument in which the opinion of an authority figure (or figures) is used as evidence to support an argument.[1] The argument from authority is often considered a logical fallacy[2] and obtaining knowledge in this way is fallible.[3][4]

  Again, just baseless speculation. Rob had a very prolific where he worked on foundational technologies like programming language design. He is now retired. What kind of power would he be afraid to lose?

Clout? Historical importance? Feeling like people are forgetting him? If he didn't care about any of this, he wouldn't have a social media account.