This is very reminiscent of the initial hn response to DropBox [0]. This is like saying that you can build a Tesla clone by attaching 3 pieces of wood together along with 4 wheels.
Although it is technically cool, it misses practically all of what makes Slack so popular - UX.
Although it is technically cool, it misses practically all of what makes Slack so popular - UX.
[0]: https://news.ycombinator.com/item?id=8863