As a Canadian, I'm most interested in when Stripe will start supporting our Interac debit cards. At that point, from my point of view, it'll have taken over the world. :)
How often do you actually buy things online with interac? I think I've maybe done it once, and the redirect-to-the-bank flow is pretty awkward. My sense is that this isn't ever a barrier to conversion for Canadians (except maybe for very large purchases?), but I'd be curious to hear otherwise.
I'm thinking of the average person who buys with Interac to avoid debt, and feels an impedance to buying online because of credit-card-only. I'd love to have the ability to enable those people's purchases through Stripe.
(I agree that the bank-redirect flow is awkward slash awful. However, you solved exactly that problem with your Alipay integration! :) )