My MI is fine, coming up on 2 years soon. Once established it'll eat anything, but it is very sensitive IMO/E to psychological factors, you might say. It easily gets stressed in the wrong conditions (small tank, aggressive tank mates). This quickly turns to insufficient eating, which for a fish that requires so much food, can be detrimental almost instantly.
I wouldn't say the quoyi eats a ton.... for its size, I'd say pretty average. The MI and quoyi ignore each other, as does the quoyi and the clowns. The clowns particularly hate the rock beauty and a couple of the small butterflies though
Thanks for the compliments!