This is one of the reasons I like PayPal and use it in preference to credit cards for online purchases. It has very low friction. To buy something online I normally need to get up, find my card (back when I used CC frequently, I had the numbers memorized, but no more), type in digits, go through the whole procedure.

Whereas, with PP, the site just takes me to PayPal's site where cookies know who I am, so I just enter my password, press OK, and I'm done.

It's gotten to the point where I often check if a vendor takes PayPal as soon as I even think of ordering.