I've seen a couple of questions similar to this, but didn't catch any ideas when searching.
I can setup an attribute field on the fly to read an Arcade expression, and in Web AppBuilder can even export the attribute table containing the Arcade-derived values as .csv (NICE!). But might also be nice to have the option to save that info to the layer itself. A "Save Expression Results as Attribute" action or similar that converts the expression results to a new static attribute. Anyone else have use for this?
Paul