I remember reading that the local group, Laniakea Supercluster and the great attractor [1] are new developments that helped us refine our understanding of H0 but didn't fundamentally remove the controversy.
It's exciting to see how the question drives many new discoveries.
I'll try to paraphrase what it meant: measuring H0 comes down to measuring the relative velocity of galaxies around us. The great attractor was a relatively recent discovery that the "closer" galaxies, the ones we can use in the distance ladder, all have a common component in their velocities which we've recently begun to understand better.
It's exciting to see how the question drives many new discoveries.
[1] https://en.wikipedia.org/wiki/Great_Attractor
I'll try to paraphrase what it meant: measuring H0 comes down to measuring the relative velocity of galaxies around us. The great attractor was a relatively recent discovery that the "closer" galaxies, the ones we can use in the distance ladder, all have a common component in their velocities which we've recently begun to understand better.