Not true. The anonymous credentials created in WabiSabi coinjoins can be used as a second layer: https://twitter.com/MrKukks/status/1619294643451199489
Sounds interesting I need to look more into this, but even if this offers anonymity, Wasabi Coinjoins are not ecash so don't offer the same level of privacy
Does this actually scale non-custodial and permissionlessly?