I mean, I read it as a typical signing off and handing over the reigns message. And on his personal twitter, not VMPs.
Regardless of your feeling on his writing abilities (I dont read most of the booklets so I cant comment on that) getting a process or division setup within a company is generally a pain in the ass. Of course he’s not the first one to ever do it, but it is a significant part of VMP now, which is itself a much bigger company with higher visibility than when he started. I could see being proud of that and the fact he gets to hand it off to someone while he focuses on new things.
Could he have been more humble? Sure...but it is his personal twitter and certainly I dont think a big enough deal as many are making it.