It wasn’t? VOY’s didn’t change. Every incarnation of Trek has had its own new uniforms, even when set in the same period. I.e. DS9 didn’t adopt TNG’s uniforms and Lower Decks isn’t adopting TNG’s. It’s not shocking to think that DS9 might have wanted to further associate itself with a very popular television and now movie series. The ratings drop throughout TV spooked them as much as anyone. They already added Worf and VOY Seven.New costumes for DS9 was a ratings stunt?
I don’t think TNG and DS9 hurt each other. Not that fans don’t try to.Hurt by TNG movies being made when they were?