Very cool that they were developing the one-gyro control mode all the way back in 2004, and had in-flight tested it by 2008. Seems like they were well prepared for this eventuality.
I doubt it'll be from spacewalks on Dragon, given they probably can't support something as big as an MMU (unless they pull a really cool hat trick), but maybe with Starship.
I get that at some point it's more worthwhile to launch a new telescope (maybe one of those donated KENNENs from NRO), but Hubble is a big symbol of space exploration, and SpaceX is all about big symbols...