In order to have automatic device compatibility we've built this whole web platform, paying huge prices along the way in speed, data size, etc, but it's all worth it because you can deploy your application instantly and everyone will be able to use it with a consistent experience across all devices and platforms.

Then they go and try to re-do something probably a dozen layers deeper than the frontend application code they used; scrolling - and will probably be surprised to learn there are compatibility problems!

Unusable on OS X + Firefox. Definitely didn't test on other browsers.