[TylerE]

None of those I would really class as "fancy". Good ink, yes. Fancy, no.

They're not (except maybe Diamine occasionally) making shimmer inks, or glitter inks, or color shift inks, or ...

I'm talking mostly about small boutique makers.

[bayindirh]

Fancy has a lot of meanings. For me, fancy means higher quality, for you means glitter/shimmer inks, which I personally don't prefer to use. However, having different opinions are OK, though, this is how it should be.

For me, a good permanent or IG ink is fancy enough, because I can use them in my lab notebooks and be sure to open and re-read it five years later. For you, a fancy ink brings you joy and has different tricks IIUC, and is equally valid.