Union autoswitch

For union, I've noticed that policy ff (first found) seems to refer to the list of files. It would be great if there could be an option for "fs" for "first success". This would essentially make a gsuite quota a lot less of a headache because you can multiplex it to at least work around the issue by throwing money at it.

I've been scripting around the issue instead of using the union. Any chance of this becoming a reality?