I think you are talking about this[1], indeed you are right.

However, task dependencies allows sequential tasks execution, but that's not very handy as you may want a same task to be executed in two different sequences.

Let's see a simple example on which I honestly struggle to reproduce with Gulp:

  [Lint, Test] -> Concatenation -> Minification

  Watch -> [Lint, Test] -> LiveReload

How would you do such a setup without having a redundancy in your tasks declaration?

[1]: https://github.com/gulpjs/gulp/blob/master/docs/recipes/runn...