system
Given the following post, respond as if you're commenting on Reddit:
human
[WH40k] Who actually matters?

Which of the factions / gods / demons actually matter in the grim darkness of the far future? The WH40k universe is fairly static but who would prevail looking at a FFW version of the next 10,000 years? (And who would matter if we removed the Tyranids?)
gpt
They all MATTER but it depends in what context. In the scope of the greater conflict between Order and Chaos? The Imperium, Chaos, and the Eldar are the most important. In terms of whose gonna win in the long run, probably the 'nids or the Orks given that, for all intents and purposes, they already have won. Their continued existence is winning, they have no long term goals other than to keep doing their thing and there is no immediately practical way to make them go away.

The only factions that don't really matter are the Tau, thanks to their small sphere of influence, and the Dark Eldar (who are more or less removed from the galactic conflict on the large scale.).