In Madrid currently. Almost every transaction is being asked USD or Euros. Of course I choose Euros. One restaurant I was at tonight charged me in USD without asking, but hey, what can you do? (I don’t really have any Spanish)

Amex is not accepted most places here.

ApplePay (Chase Visa) does not stop DCC, but it does prevent you from having to sign.

Supermarkets seem to not ask for USD and only charge in Euros.
Renfe only charges in Euros.
BBVA ATM asked if I wanted to withdraw in USD or Euros, of course I chose Euros.
I think I hate DCC at ATMs the most.