okay, first there were the Eldar, lithe and graceful. But as they held awesome play parties, their gear grew more extravagant until they awakened Slaanesh from the void. Now the Eldar are isolated to ships with big fins, wearing hats with big fins and lots of glossy jewels.

The immortal Emperor led humanity back to the stars, but his warmaster tried prevent an imperial cult. In a tragic twist, putting EVEN MORE horns, skulls and gunk on their armor led to the Imperium sticking more and more maltese crosses, skulls and big tomes all over everything.

What I'm saying here is that the story of Warhammer 40000 is about adding more and more fiddly details to paint. Will the Tau retain their relatively clean design aesthetic or, in time, will they too have little sensor fins and drone attachments to everything?