The thing is most people aren't Amazon or Walmart (I don't know overstock.com). People do have a relationship with Amazon, so their login makes more sense, simply because of the amount of repeat customers.
Most sites aren't Amazon though, they only get the customer for this one particular purchase, because they happen to be the cheapest, or the one with the item in stock.
If anything has chanced it's that your checkout flow needs to be even simpler, so it fits better on phones.
Most sites aren't Amazon though, they only get the customer for this one particular purchase, because they happen to be the cheapest, or the one with the item in stock.
If anything has chanced it's that your checkout flow needs to be even simpler, so it fits better on phones.