These huge improvements in efficiency and parallelization paint NEO as the first major competitor to Ethereum. In the past, the Ethereum blockchain has been overloaded by the instantly popular crypto-kittens game, an addictive game where virtual kittens are bred, born and traded on the Ethereum blockchain. At its peak, the crypto-kittens game caused severe network congestion and currently makes up around 20% of all Ethereum traffic. This disruption made it blatantly apparent that scaling remains a major issue in the world of cryptocurrency, an issue that will need to be resolved if mass adoption is ever to take place.
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From @sachinsanju