I cannot express just how much I want this to happen.
No attempt = hubble will fail and reenter
Attempt(failure) = same
Attempt(success) = hubble continues groundbreaking science and, after some time, can be brought back to earth via Starship to become a museum piece that inspires generations!!
I think the current mission being explored is docking a dragon trunk and boosting it and servicing it. That could buy us enough time until starship cargo is ready. STS-125 added a docking port for capture, which is going to be used by a satellite to deorbit if it comes time to do that.