Earlier quoted context omitted.
The advantage of PayPal is that I can make one-time purchase at random vendor whom I have no prior experience with, without having to trust them to protect my Credit Card info.
Isn't this the same benefit you get from stripe? Further being famously bad at developing software anyone would want to use doesn't necessarily mean that someone is incompetent in all aspects but it would decrease my trust in paypal just a little.
If I remember right, the older checkouts were hosted on vendor's website -- and you would not know if the cc info really goes to stripe only, or if vendor grabs a copy as well.