Those big seige towers from the cinematic are using Azerite too I think.
That being said, Sylvanas' war machines were probably built by goblins which makes them far more dangerous. I'm guessing the fire that burns Teldrassil is more because one of them backfire or explode than just being a super powerful WMD. Like, they built this weapon because Azerite is powerful but turns out it makes way better bombs than it does machines and they learn that the hard way.