As I've written in other comments, I'm not saying there aren't particular use-cases where Hashgraph may be useful, such as for the purpose of a temporal distributed order book. But the thing is, perhaps you can explain to me (except for possibly a more stream-lined "plug-and-play" solution), how this is so revolutionary versus something like Bisq Network (also open-source and written in Java):

To be properly decentralized, one must avoid single points of failure:

• Bisq does not hold any bitcoins. All are held in multisignature addresses rather than a Bisq-controlled wallet.
• Bisq does not hold any national currency. National currency is transferred directly from one trader to the other.
• Bisq uses a Peer-to-Peer network over Tor. This means there are no servers to be hacked or DDoS’d.
• Bisq does not know the traders. No data is stored on who trades with whom.
• Bisq does not require registration. This means privacy is maintained, there are no “approval” wait times, * and identity theft becomes impossible.
• Bisq is not a company. It is an open source project organized as a Decentralized Autonomous Organization (DAO).

Link: Bisq Network FAQ

In addition, by using TOR, counterparties have a lot more anonymity than I would expect they would through a Swirlds-based solution, but feel free to correct me if I'm wrong on this.

Also, perhaps you can also better explain to me this whole concept of "gossip about gossip", because the more I try to understand it, the more it seems to me little more than a fancy marketing "buzzword".