What is the feature you would like requested?

When creating something with a crafting profession, multiply the cast time by the number of items one is crafting.

I'm sitting here making over 100 Bolts of Linen Cloth and it keeps renewing the 3.0s cast time.
Would be neat to have one long cast bar that shows 300s or, even better, 5 minutes.

ElvUI has this function https://git.tukui.org/elvui/elvui/blob/development/ElvUI/Libraries/oUF/elements/castbar.lua
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Added as of 2da7894. Will be in on the next release.