I guess it depends how deep into the lore you go. The oldest dragon myths, like in Norse sagas or Chinese legends, set this baseline of immense power and ancient wisdom. You see that echoed in a ton of modern stuff. Think of Smaug—he's not just a big lizard, he's a hoarder, arrogant, speaks in riddles, all traits that feel pulled from Fafnir or Nidhogg. Those origin stories make dragons more than monsters; they're forces of nature, which a lot of fantasy authors latch onto to give their dragons weight beyond just being a cool mount or a boss fight.
But sometimes I think modern stories push back against that. Like, you get these dragon characters who are trying to be something else, but the origin traits hang over them. In Anne McCaffrey's Pern books, the dragons are telepathic partners, but they're still tied to that elemental fire-breathing legacy. The origin gives writers a template to either follow or deliberately subvert. It's hard to make a dragon feel truly 'new' without acknowledging that deep well of myth they all drink from.
My favorite is when authors play with the greed thing. The dragon's hoard doesn't have to be gold; it can be knowledge, or people, or memories. That shift still feels rooted in the original sin of dragon stories, which is this possessive, obsessive nature.