system
Given the following post, respond as if you're commenting on Reddit:
human
[WH40K] Why isn't the Chaos Fleet much more advanced than the Imperium, considering that Dark Mechanicus can actually freely innovate?
gpt
Exposure to Chaos energies tends to make you a little... crazy.

So producing a new engine powered by screams could be innovative science. Or it could be...

###*SCIENCE!*

That doesn't actually do anything better. With Chaos it's always going to be a mixed bag that tends toward the latter. Also take into account that with Chaos the more things change, the more they stay the same. You're dealing with gods of constant war, entropy/decay, intricate plots (for the sake of plans and schemes, not necessarily that go anywhere), and sheer pleasure. None of these are conducive to advancement.