Sure Google could break this (maliciously or otherwise), but would you rather have to keep up with their changes on your own, or build something that works on I

Sure Google could break this (maliciously or otherwise), but would you rather have to keep up with their changes on your own, or build something that works on InboxSDK, and let them play cat-and-mouse with the Inbox DOM? Worst case in the latter scenario is that a feature is down for as long as it takes for a fix to be released.