[jopsen]

> Many problems related to online shopping cart abandonment can be traced to checkout forms, which can be difficult and time-consuming to fill out...

People stop at the checkout forms because that's often the only place you actually know the price.

There are so many dark patterns adding fees, adding shipping cost, or signup to newsletters, that the only place you know what you will be charged is when you're making the payment.

It's not unlikely that people click through to checkout, just to find out what a thing will cost.

----

On topic, there certainly are place online where I'd rather use a browser based payment flow that ideally doesn't involve me sharing credit card numbers with a merchant.