In some of my personal code I liked to have used it (in very specific circumstances, like having many similar-sized parameter declarations e.g. protobuf), but as you said the lack of support means that a lot of code formatters simply trim unnecessary spaces so they never stick around.

What's more, I am still yet to find a consistent rule about when to apply this kind of formatting - the example in the article shows one for method args but it just doesn't look good at all. Key-value lists (like maps) might be a good place to use it, but if one key ends up being very long you have a ton of unnecessary space, so I would need to "group" together similar-length keys to make it aesthetically pleasing:

const map = {
  foo:    1,
  bar:    2,
  bazbar: 3,

  // I don't want the keys above to be spaced to match this key
  someExtremelyLongKeyname: 4
}