The #hashgraph launch event was impressive. Beyond the annoying hype, the optimal consensus algorithm. In practice, >1e5 tps with final consensus in ~3s. And already plenty of applications, community, institutional partners. Bonus: Common Lisp and Coq.
As usual, the problems, if any, probably lie with whatever they did not show. And the worst problems won't be with what they deliberately try to hide, but with what they silently ignore because even they can't see it.
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