Private blockchain vs Ethereum


In my understanding, the development of a blockchain platform is very expensive and it takes a long time. For this reason, I expected that banks and government organisations more likely to use blockchains such as Ethereum (as it also provides an private blockchain options).

What surprised me is that Korean banks starts using blockchain platforms developed by Samsung.

[https://cointelegraph.com/news/south-korean-banking-group-to-launch-blockchain-powered-id-verification-platform](https://cointelegraph.com/news/south-korean-banking-group-to-launch-blockchain-powered-id-verification-platform)

Furthermore, LG has introduced its own blockchain service and many Korean companies are considering to use this.

[https://cryptovest.com/news/lg-cns-komsco-to-build-s-koreas-first-public-blockchain-system/](https://cryptovest.com/news/lg-cns-komsco-to-build-s-koreas-first-public-blockchain-system/)

If big electronic companies can launch a usable blockchain platform so quickly and efficiently, what are advantages of current famous blockchain platform projects such as Ethereum, EOS and Qtum, etc.

I would appreciate any comments on this topic. Thank you in advance.

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