There numerous projects that are far better than ethereum in term of scalability, the tech and smart contract but you know the game of whales, they wouldn't allow others to take over, they have hold for really long time, they wouldn't want anything that will jeopardise their bags.
If Ethereum is goo, will they choose to move from proof of work to proof of stake, that's because they lack the ability to scale up that's why they are implementing chain split.