Mode Analytics published some data years ago showing that SQL programmers who preferred leading commas had a lower rate of errors than programmers who used trailing commas. [0]
I do this but I'm skeptical of the causation. I think it might be a symptom of people who are generally more careful with syntax because the formatting means more to them, so they spend time reading the query and moving bits around, which is how they find little typo bugs.
0 - https://mode.com/blog/should-sql-queries-use-trailing-or-lea...