Interesting! Of course any privacy guarantee from fiat eCash would have to be verified. Because frankly I don't trust those people further than I can throw them. Let's just say I strongly doubt Augustin Carsten suddenly turned into a financial privacy advocate. 🤔
Bank of International Settlements (BIS) says "Privacy is a foundational feature for retail CBDC" and presents "Project Tourbillon" – an ecash pilot for central banks.
What kind of timeline is this.
https://www.ledgerinsights.com/swiss-national-bank-bis-anonymous-cbdc/
https://void.cat/d/TKcZtyZcbmm62N8E5nfAL9.webp
Discussion
Correct, caution is appropriate. However, if you can verify your ecash wallet's crypto as sound, you can be pretty sure that as a user of that wallet you'll benefit from the privacy.
If you know that the protocol is safe and you can verify the code you're running in your wallet, you don't have trust the operator for your privacy.