I'm curious to know what the percentage of places are that 1. Support contactless 2. support chip 3. only support swiping.
Secondly, I wonder if they can, for example, have a different number on the swipe, and have that number require extra security (such as approving each transaction on your phone).
Anecdotal - I'm in Canada and pay mostly with credit cards. I don't even recall swiping my card in the past two years. I've basically been doing contactless under $100 whenever I can and chip and pin for all other transactions.
I used to live there 6-7 years ago and even then I used contactless all the time. I've since moved the US (silicon valley no less), and no one had contact-less. Just this year my credit card finally got tap support... So yeah Canada is easily a decade ahead when it comes to this.
Secondly, I wonder if they can, for example, have a different number on the swipe, and have that number require extra security (such as approving each transaction on your phone).