The Community Tech team is trying to find out stats about edit conflicts. It looks like there was a patch merged back in January to collect stats on this (https://gerrit.wikimedia.org/r/#/c/266760/2/includes/EditPage.php) but I can't figure out where this is actually collecting the stats at. It looks like it's using the BufferingStatsdDataFactory class, but I couldn't find any documentation on what this is or where it actually collects the stats and I don't have time at the moment to investigate more deeply.