Why is "multiselect.frother.renderer" a hidden option for multi-select fields?

[Rob Horan]

The current multi-select renderer makes for a difficult user experience.  This makes all the difference, so why is this a hidden "dark feature"?  Is there a risk of its use?

[YunFan Ni]

we are also trying to enable the multiselect.frother.renderer dark feature, is there any risk?

[Rob Horan]

I'm still waiting on an answer.