Sure. In Go, this was one of the details that cemented my love for the language. Imagine you have a multiline list, sorted alphabetically.

  strs = [
    "a",
    "b",
    "c"
  ]

If you don't have a trailing comma (looking at you, JSON), when you add a new item, you have to make changes on two lines:

  strs = [
    "a",
    "b",
    "c", // Change 1.
    "d"  // Change 2.
  ]

On the other hand, when you have obligatory trailing comma on multiline lists, there is only one change:

  strs = [
    "a",
    "b",
    "c", // No change, since the comma was already there.
    "d", // Change 1.
  ]