@oantolin In my mind, it doesn’t replace org, it’s just a natural way to write in org-mode (I write in org-mode). I understand you probably mean plain org files.
That’s a long answer I should probably post about… but in general, it just introduced (or reintroduced) plenty of things I was already doing but not consistently enough. When I write a note in Denote, I have the basic building blocks that remind me what I should include so I have a good technical document in front of me (that’s my usual usecase), completed with the right keywords, links, images, etc.
I had my own wiki org files before Denote, and it was messier, and finding things was harder. So it’s not really a replacement for “vanilla” org, more like an enhanced version. I hope this answers your question somehow at least.