We're at 2.9.x now and the ability to change the delimiter is still not an option.
We could use the Arcade expression to change the comma delimiter to an underscore, as we normally do but the issues is the sorting -- the first field we use is a numeric field and we would like to sort per this number. When changing the delimiter, this works fine. However, when we use the Arcade function, it seems to turn the numeric values of 1, 2, 3, 4, into text. So the sorting doesn't happen correctly. (as other users have mentioned in this thread)
While we could add zeros to the beginning of our lower numbers, not only is this an extra step, but our Style files all reference values that DO NOT have the extra zeros.
Has anyone else run into this as an issue? Does Esri have any issue with adding the ability to change the delimiter?
I've attached screenshots of the sorting for the same feature class -- one with symbology based on three fields delimited with commas (sorting correct) and one with symbology based on a Custom Arcade function (sorting incorrectly).
Thanks!