Taylor Hornby's own write-up is quite an interesting read: https://drive.google.com/file/d/1SVK41y-ip3Vw9eB69E9QRy-Qn3i...

Craziest part is that because of Zcash's zero-knowledge design, there's no way to tell whether it was ever exploited. All ~$1.3B sitting in the Orchard pool (Zcash's main shielded/private pool, where most private ZEC lives) could have been minted out of thin air. BTW similar counterfeiting bug was disclosed in 2019, also never known to have been exploited.

all with the public model too, no Mythos access.