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Probably depends on how many people do not want the upgrade.
If enough people decide they dont want it, then you get a second coin.

This is more of new upgrades being applied on to the platform. No currency split known till now like bitcoin hard fork.

Well, kinda.
Ethereum was the first to split I believe. Thats where ETH and ETC come from.

I don't think it is going to be as two different currency like what happened with BTC hard fork. And more over most ETH developers are supporting this fork which i don't believe results in two different currencies

Not likely. The developer community of ETH is nowhere near divided as the BTC community was/is.

yeah thats correct.

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