Moving from cash to credit cards, PayPal, etc. is an ongoing privacy disaster

A GrapheneOS post calls the shift from cash to cards and PayPal a privacy disaster.

A GrapheneOS social post, linked from Hacker News, argues that shifting from cash to credit cards, PayPal, and similar payment methods is an ongoing privacy problem. The item contains no incident, dataset, or technical analysis, only the claim and a note that the Hacker News thread had 28 points and 12 comments.