The Hubble Space Telescope will enter a decaying orbit in 2024.
This is a physics based question, so I don't want to get into the engineering details more than necessary.
Just for background, the last Shuttle mission fitted a soft capture mechanism to the back end of the spacecraft. This ring will give future robotic spacecraft an easy place to grab onto and possibly enable significant orbital alterations to be made.
My question is: would the HST be of any practical benefit if it was transferred to a Lagrangian L4 or L5 point?
These points would require the least propellant in maintaining a "fixed" position.