This is a somewhat misleading article, considering that it fails to mention that Hubble is only vulnerable right now because its orbit has decayed well below its typical orbit and a boosting mission is being worked on.

As for ground based telescopes, there's constant work being done on compensating for satellite streaks, with SpaceX seeming to be in good faith cooperation with the NSF on the matter.

Additionally, a lot of recent discourse on the matter I've come across seemed to be really blowing things out of proportion (eg a few days ago I came across an image on Reddit claiming to be of the satellite streaks when attempting to take a photograph, only for it to turn out to be specifically the frames where there was a streak stacked together, making it seem much worse than it was).

Usually telescopes are studying some narrow patch of sky and the satellites are still more than sparse enough for streaks to be unlikely and quickly passing through if they do happen to occur.