I don't see the need to become bloated like slack and a one size fits all application. They do a great job with the product they have. Is there anything wrong with just being what you are? Why does the lack of a second act need to be a bad thing if your first product is great and still extremely valuable?

I would also if anything put Zoom in with Dropbox, they have a product that is by far the most enjoyable to use in that space, but any other offshoot is not worth it.