Or... your company should be training potential replacements. This is what the US military and "white shoe" consulting companies do. While expensive, it guarantees that critically needed skilled staff are always available.
I recommend the article "Up or Out: Solving the IT Turnover Crisis" [0] which gives a reasonable argument for doing exactly that.
Notes:
0 - https://thedailywtf.com/articles/up-or-out-solving-the-it-tu...
Hanlon's razor still applies: "never attribute to malice that which is adequately explained by stupidity" [0]. He might be such a foreign agents, however we know that he is unintelligent and narcissistic, therefore everyone who makes him look stupid/bad is suddenly "public enemy number one."
Notes:
One provision of the Sony Bono Copyright Extension Act [0] (which expired 6 months after passage of the law) allowed next-of-kin to revoke (the sale of) copyrights sold by the author without recourse (by the folks who paid for them). Allegedly, this was added by Disney in order to cut costs hundreds of millions of dollars in a dispute over licensing Winnie The Pooh IP/rights [1].
Expect something similar when the next big author dies; my prediction: JK Rowling.
Notes:
0 - https://www.congress.gov/bill/105th-congress/senate-bill/505
1- https://hughstephensblog.net/2023/12/18/winnie-the-poohs-cop...