I didn't see any additional DCC in Singapore, Thailand, or Japan although admittedly I had few data points from Thailand. I had some leftover SGD that I opted to change to THB, so outside of the hotel and two fast food restaurants I used cash. The DCC implementation at 7-Eleven ATMs in Japan remains unchanged from a year ago.

More interestingly, I was doing an AAdvantage Hotels stay at a local Hilton this week. Normally I use my Hilton AmEx, but I didn't have it on me when I checked in. The terminals there use Evalon as the payments processor, and when I tapped the Visa card a message that appeared that said something like, "Wait for DCC..." that wasn't present with an AmEx. Since this was a USD denominated card there was no way to test if DCC would appear on the preauth for a non-USD card.