@atronoush this is a valuable subject you raise. I have being working on the more general question of substitution as a whole, rather than specifically the new backtick forms of substitution which is only one way to go about it.
- The key observation so far for me is only the first value will returned.
- Although if you wanted to pass a list into an attribute you can use join and or the new substitute operator.
However I am finding I am getting the most value from the new functions, see here How to set a tiddly field with the output of a macro call - #4 by TW_Tones