I (not a physicist) had the impression that it was mostly discarded too. This article from 2022 seems to contradict that: https://theconversation.com/dark-matt

I (not a physicist) had the impression that it was mostly discarded too. This article from 2022 seems to contradict that: https://theconversation.com/dark-matter-our-review-suggests-its-time-to-ditch-it-in-favour-of-a-new-theory-of-gravity-186344 https://theconversation.com/dark-matter-our-review-suggests-... It doesn't mention the Bullet Cluster though.