During prototyping, I'm frequently adding and removing entries from lists, or change their order. It's really annoying when you have to update the commas afterwards. Much nicer dev experience when ever entry ends with a comma, and you can juggle them around at will.
When you start working with sql you despise leading commas.
When you stop working with any other code than SQL you look back on your younger self and think ‘I was soooo young’ when typing those lovely leading commas.
That sounds made up on the spot. I wrote leading commas in SQL for decades, no such thought crossed my mind. I still use and suggest them to people. They look especially good when aligning selected columns.
