When you'll send a link to that new payment provider you're interested in (Stripe) to your manager/boss/coworker. He might very well open that on the move on a

When you'll send a link to that new payment provider you're interested in (Stripe) to your manager/boss/coworker. He might very well open that on the move on a tablet with a 3G connection. You're not making a good first impression if the only feedback you have is the site didn't load, and I speak from experience ;)