I'm still studying this, but I'm curious to hear a few more opinions related to Hashgraph.

Nick Johnson from Ethereum said: Based on a quick skim, it's pretty interesting. The system seems well thought out, and at first glance, sound. The main issue I see is that the number of full nodes that can participate is limited: adding a new full node requires every full node to do more work, so it doesn't scale to large numbers of nodes. How much that matters depends on whether you could build a light-client type system around it.