He retired only a couple years ago (after flying the Crew Dragon DEMO-2 mission), so he might be up for it! To continue this jocular train of thought a bit further, which shuttle would they refurbish? Atlantis, Discovery, or Endeavor?

They touch on that at near the end of the article, but there aren't really any updates:

Last year, SpaceX and NASA announced a feasibility study to determine whether it might be possible for a Dragon spacecraft to link up with Hubble and reboost the observatory, extending its orbital lifetime. This six-month study, which was concluded earlier this year, was also expected to look at ways for astronauts on the Dragon capsule to potentially service Hubble. If a servicing mission is deemed possible, swapping out gyros would surely be at the top of NASA's priority list.

NASA and SpaceX have not released the results of the feasibility study.

I think they're planning on testing Dragon EVA capabilities on the Polaris Dawn mission early next year. If that goes well, Polaris 2 could be the Hubble servicing mission. Polaris 3 is slated to be the first crewed flight of Starship.