Interested to see what the PSD2/SCA implementation looks like. Stripe will go out of their way to avoid adding friction, but the requirements are not trivial.
You’re right, they are definitely not trivial :) We’ve done a lot of work to make Checkout automatically support PSD2/SCA compliance out of the box — we’ll trigger 3DS only when it’s required. More here: https://stripe.com/en-US/payments/strong-customer-authentica...