league/csv package a bit of a booby trap in waiting
We currently have v9.3 of csv/league on our wmf code and 9.2 in our civi code and have no issues - however we recently tried 9.6 in our CI and found it crashes when co-existing with 9.2 which civi has - due to this removal
Although we have no specific reason to update to 9.6 at this stage we can assume that some WP sites might in the nearish future and I think we could mitigate the iminent pain by upgrading civi to a patched version of 9.6 that puts that function back & hence gets us past the transitional wobbles (we can unpatch later on)