And there are still some holdouts against the idea that birds are descended from dinosaurs so that is not entirely settled yet.
My apologies if this is off-topic but this is actually something I've wondered about for some time. Just how contentious is the relationship between birds and dinosaurs? I've heard that it is still, as you say, not settled yet. Are there indeed still legitimate doubts about this among those in the fields (biologists, taxonomists, etc)?