Next time, at least share a story of something cool you have done, that would make your post much more appealing.
Also, it does add value to the discussion. At my company we've been using Cumulus Linux on white box switches to be able to build huge Clos networks at a fraction of the cost of traditional vendors like Juniper or Cisco. Such white box solutions are essential for building networks like this because traditional vendors are far too cost prohibitive.
Also, if you still doubt the relevance of Cumulus, the top comment on HN's previous thread specifically mentioned Cumulus, and that comment was from someone involved in building the first three generations of network: