Without the order book, how in the world are you supposed to know where the big buy and sell walls are and at what depth your limit order is placed? The order book is invaluable for traders.
Buy and sell walls can appear and disappear any second and spoil any strategy based on them. In fact I'm pretty sure it's the big whales who set them just to manipulate the market.
Do forex traders use order books?
There is next generation exchange available for on this platform than why still people are looking for other exchanges.
Because they like to gamble. I had abandoned the crypto world (big mistake BTW, I'd be now rich if I hadn't) a few months months after having discovered it in 2014 just because it was little more than a giant casino of gamblers and cheaters, which I didn't like. Pump& dumps schemes, fake walls, in time I've learnt on my skin all the dirty tricks whales use in exchanges. People who like to play and/or to gamble still prefer exchanges (I'm now having some fun in exchanges myself, BTW), but for serious investing Bancor's new paradigm is a game changer. Once it'll be adopted, expect more and more big serious players enter the game and send the whole crypto economy to the moon.