FYI your comments seem to be showing up as dead (dead comments don't show up by default, only when people logged into HN have them enabled), I think something may have triggered a shadowban on your account. Might want to send a message to the moderators.
I hit 'vouch' for the comment I'm responding to so it should be visible, but the other response you gave (https://www.hackerneue.com/item?id=44353277) is still listed as dead.
You're also right that AES-GCM is faster and has hardware support. Ariadne explores a different trade-off. Its primary advantage is its architectural agility.
Instead of a fixed algorithm, the sequence of operations in Ariadne is dynamic and secret, derived from the key and data history. An attacker doesn't just need to break a key; they have to contend with an unknown, ephemeral algorithm.
This same flexible structure allows the core CVM to be reconfigured into other primitives. We've built concepts for programmable proofs-of-work, verifiable delay functions, and even ring signatures.