For those who care, I will tell you why I don't use it more places. Let me preface this by saying I would use it everything if possible, but here are the reasons I don't/can't: First, I live in a smaller area and most retailers STILL do not accept contactless payment. There are a couple, but there are only 3 grocery stores in my city, and only 1 takes Apple Pay (its also the most expensive). Second, many stores are coming up with with their own forms of mobile payment , which the other two stores in my town have (Walmart pay and Kroger pay). I save way more money going to those stores so I am forced to use their payments and they are extremely annoying. The gas station I frequent does take Apple Pay, but has a specialized debit card for their stores. I save at least 6-10 cents in gas each time I fill up so its worth it to use that card in the long run, but that card doesn't work with apple wallet (yet, I'm hoping).
Long story short, I think that credit card processing machines are where apple needs to focus their efforts. Convince processing companies to roll out new devices to business not currently taking them and they will see increase in areas like mine. Even Home Depot got brand new machines, with no contactless payment option...the very same machines that DO have contactless payment at other stores I have gone to.