I can't emphasize enough how important it is for the OS vendor to "set a good example" when designing their own apps for the OS. Like it or not, devs will look

I can't emphasize enough how important it is for the OS vendor to "set a good example" when designing their own apps for the OS. Like it or not, devs will look to the built-in apps for guidance on what to make theirs look like -- this is also true for how buggy or unresponsive an app can get before it is deemed "unacceptable". Put another way, think of first-party apps as a form of enforced competition. If do don't do better than the level we, the OS vendor, are competing on, then users will be disappointed in you.