[kijin]

Judging from how proactive Stripe is being with respect to recent changes, they probably have a Plan B in case the iframe exception disappears. For example, they could provide a payment page hosted with them that you can customize (basically an enhanced version of Stripe Checkout), or even offer to iframe your webpage the other way around.

[StavrosK]

Yep, knowing Stripe, I'm not that worried that they won't be able to figure something out. What does worry me is that they need to figure something out at all.