For me, my biggest pain point with dealing with different vendors is the checkout process,having to create a new account and constantly provide credit card information (I avoid storing my info, if possible). I'm really looking forward to Apple Pay for the web being more widespread. A few weeks ago I was looking for a vacuum part and found it cheapest at newegg.com. Got to checkout, and to my pleasant surprise, there was an option to pay with Apple Pay. It was such a stupidly easy process that newegg got a far more loyal customer out of me.