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On mobile absolutely [1]. Not sure on the computer, but I use it all the time.

[1] https://capitaloneshopping.com/research/apple-pay-statistics...

Apple Pay rocks, it has saved me a few times when I forgot my wallet. And it’s faster to use than pulling out my wallet.

I don't know whether it is popular everywhere, but it is certainly popular everywhere I go (anywhere in the US, and western Europe). I absolutely love it.

I use it whenever I can, whether on laptop or mobile.