<Raises hand> Took about a developer day to fix everything. Drag/drop list reordering, pan/zoom image cropper were the primary things busted. IMO, the change was an unacceptably aggressive move by the Chrome team made with good intentions.
It broke our web apps. Specifically, drag and drop list reordering functionality and image cropping. I was pissed when it happened. It wasn't a change that a typical content site would be broken by, but a lot of web apps were: drag/drop reordering isn't a very unusual feature these days.
What we do is process a check in our admin which hits Stripe's API to create the customer if necessary (no payment source necessary when doing this via API in our experience) and then adjust the customer's account balance by the amount of the check. Then we process the customer's subscription and Stripe automatically debits the customer's account to pay the invoice.
If you can get away with that, it's certainly a way to reduce complexity. However, providing in-flow auth without a page reload is undoubtedly a nicer, faster experience. This library seems like a good way to lower the effort for Ember app developers.
Yapp is built on Ember and it has been a joy. Terrific community and a lovely layered design that lets you work at the level of abstraction appropriate to the interaction you are building. We have ember-data in production in selective places, and it definitely has a ways to go to deliver on its full promise. That said, you can't really build an ambitious app without some model/persistence concepts, or without an identity map, so it is a big win for that already.
The common refrain that I hear talking to people in NYC and the wider internet world is that people want Ember what Ember promises and has begun to deliver. More and more of those folks (including my team) are rolling up their sleeves to help make it fulfill its promise.
You can also configure a universal delay if you’re using mirage in development and want to get a feel for your app with a certain amount of latency.