I’m not a specialist, but I think some users have to provide the xpub. Is that right, @DarthCoin?
The prosecution herein refers to a main point of criticism of Samourai Wallet's design by competitors and privacy advocates, in which users who did not run their own node provided their extended public key (XPub) to Samourai Wallet's coordinator, allowing the developers to cross-reference transactions.
But the memorandum incorrectly assumes that there was "no technical or operational necessity to do so." As Hill clarifies, "the need to collect this 'XPUB' data was driven the functional necessity of calculating balances" while operating a light wallet, highlighting that only around 20% of users were affected by this design decision.