Vitalik Buterin gave a [presentation about Ethereum to Hyperledger April 28 2016](https://lists.hyperledger.org/g/toc/attachment/147/0/hyperledger.pdf) and had this slide:

[![enter image description here][1]][1]

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Buterin clarified the third point as the developer centralization observed in Bitcoin, where a single implementation is deemed the protocol.

There was no time in the presentation available to discuss the evaluation against existing virtual machines.


  [1]: https://i.sstatic.net/WrBn2.jpg