Tourist in Japan here. Suica is great. I prefer it over my Visa tap 'n pay just for speed. It's instant vs. a few seconds which isn't much, but it's nice.
Topping up a Suica every now and then vs. having many international transactions might also work out better for some. My bank (ING) gives me those fees back so it makes no difference to me.
At one point my US credit card categorized Suica top ups as travel expenses, which earned double points. So basically just tried to do all of my spending on my suica card, and racked up a ton of points in the process. Eventually they fixed that - but I had a good run for a couple of years.
Topping up a Suica every now and then vs. having many international transactions might also work out better for some. My bank (ING) gives me those fees back so it makes no difference to me.