So, let's go 100% contactless then

How is contactless rolled out in your area? In SIN, it's very popular, with (I would say) 80%+ of the stores where you pay at checkout using it (obviously, dine-in restaurants where they bring the bill to your table etc. don't) - both supermarkets and (fast) food restaurants.

In Switzerland, both big supermarkt chains (Migros, Coop) have moved to contactless terminals in the last year, as well as the nationwide Kiosk chain that is controlling like 95%+ of the market. Fast food outlets have moved to it as well (not visiting much those kind of outlets, so a bit limited experience)

Germany has less credit card acceptance overall, and seems to be slower at moving towards contactless.

Malaysia, I've not seen much contactless in my last visits there this year.

How about other, "DCC prone" places, like all variations of China, Thailand, UK, Ireland, Spain, how is contactless spreading there?

Also, how is the contactless acceptance with "foreign" cards going? I've seen cases in which non-local cards wouldn't work on the contactless reader, but would work fine when chipped into (with and without DCC attempt) - and not sure if MC/VISA prefer that people generally use credit cards paying contactless, or if they would prefer DCC to always be applied, but maybe some less payments going on with CC's in general due to contactless not working?