I’m sorry you got downvoted, I totally get that trailing commas are ‘grammatically’ wrong and would look weird.

But I find these kind of common edits a bit of a pain in formats like JSON or SQL which don’t allow trailing comma. So I was happy to use a linter which enforces them, and then I got very used to them being there.

(Replying just for the chit chat - no criticism of opposite views implied)

For me it’s not even about the diffs, but like if you want to bulk edit the lines with a multi cursor, or copy and paste to add some new lines, it helps if they’re all uniform

Wow, I’m the opposite - trailing commas are a must