Well, from what I understand (basically missed the whole thing, myself) it seemed the universe nearly exploded by 4e doing anything. Of course, without it, there would have never been a 5e. So, there's that.Why did Green Dragons change to acid in 3e and then back to poison gas in 4e without the chlorine? Would the universe have exploded if 4e went sonic?
Well, that's clearly to create balancing forces/adversaries for the (up to their inclusion, nearly solely) Evil "chromatic" dragons.What's the point of metallic dragons?
As dragons are the pinnacle of magic, power, and (often associated with/by) nature/natural forces, they can not exist only as evil-driven destructive forces. There must be the good (at least "leaning") helpful and beneficial forces as well.
What is the point of Elves and Orcs? Dwarves and Goblins? Of Celestials and Fiends? Slaadi and Modrons? Of Djinn and Efreet? Of shining Fae and shadow-shrouded Undead?
Providing conflict. Providing potential allies for the players/forces of good. Providing suitable/"well-matched" entities to balance the cosmos/existence.
ummm...yeah, no. I have thought they would be good for a "force/raw magic" option...so maybe you could say that would be laser-like. "Arcane Energy beam." But I could see the argument for your idea of a Sonic breath for silvers, too.Why aren't silver ones giant mirrors that shoot lasers (as per @Vaalingrade's brilliant suggestion)?
I suspect the real reason was a combo of 1) because it's a "white" metal, so white = Cold breath, and/or 2) gives them the direct elemental opposite to thwart Reds' fire... since they are supposedly more numerous and/or interested in being helpful to mortals than the, largely portrayed as, more "celestial/metaphysical" Golds.
Never heard of it.Is the Quasar Dragon still greatest of them all?
Don't have it. Dunno.How about the new (old) ones in Fizban?
Again, not something on which I could comment. But have wondered at the original decisions to not have Yellow (clearly the more appropos choice) as the "desert" dragons...with, then, Brass as the foil. Makes more sense, to me, than Blues and Brass trying to compete for territory.Were the orange, purple, and !?!? dragons ever worth looking at back in Dragon Magazine (iirc?)?
I homebrewed Purple dragons (with a raw magic/"force" breath weapon) in some time ago. Never even gave an Orange dragon a thought. But I'm not a fan of the color.
Crossing the path of one in a bad mood? Or hungry!What is your biggest concern about Dragons?
Other than that, in my world, their potential extinction.