the Tau delay. If I had to guess, I'd guess that's GW paring down its initial commitment to a release. If sales are falling, they might feel reducing that risk will help.
I'm talking most about the new post at Future War Stories: Where The Frak Are All The Aliens? It goes wider than many in its thinking, and it's still a pertinent question, maybe more so than ever. I recommend reading it. And thinking. Plus if you need the answer to Fermi's Paradox for any spacefaring campaign, just roll 1d10 on William's list.
Also, re the post title, I feel 'xenos' is almost a derogatory term, but 'xenoform' is a little fairer. After all, to talk about other lifeforms is to colour them with our view of what life is._