Chromatic is perhaps the most noticeable optical aberration in digital camera systems. On those occasions when I forget to remove it in ACR, I almost immediately notice it PS. If its removal introduces other aberrations, the effect does not grab my eye anything like the way chromatic does. Rainbows are hard to miss. Whatever the consequences of its removal, those would seem to pale by comparison.
Unscientifically, I have allowed myself to feel that swatting down chromatic also improves image sharpness by re-aligning edges.
And I have never kicked myself for removing chromatic, as I have sometimes done for over sharpening and such.
