I agree about cash, but we are talking about a luxury experience. In fact, GrapheneOS has talked about it [1].
> So the lack of contactless payment on GrapheneOS may be inconvenient, but is it consistent with a privacy stance
I doubt you're implying this, but GrapheneOS doesn't break contactless, Google does by blocking GrapheneOS. Contactless works with curve and paypal in Europe.
Cash is much better for privacy. The government, banking system, and countless intermediaries should not know how I spend my money.
So the lack of contactless payment on GrapheneOS may be inconvenient, but is it consistent with a privacy stance.