For the most part it's working, hiding old collections and duplicate singletons.
But it is not hiding the 3 Modulations You'll Actually Use bundle.
I have FX Collection 3, which includes the Chorus DIMENSION-D, Flanger BL-20, and Phaser BI-TRON from the 3 Modulations bundle, so this bundle should be hidden. I have so far not opted to upgrade to FX Collection 4. I wonder if that's the reason the 3 Modulations bundle isn't being hidden. Either that or because the 3 Modulations You'll Actually Use bundle is discontinued.
Also, Augmented Strings Intro isn't being hidden. I supposed because "Intro" is a different version than the full Augmented Strings included in V Collection? Kinda dumb if that's the case.