We have systems in place to make sure we catch any changes to the DOM. We usually see these changes before 99% of gmail users and can make any necessary changes

We have systems in place to make sure we catch any changes to the DOM. We usually see these changes before 99% of gmail users and can make any necessary changes within minutes usually. In the last 6 months we've seen 0 breaking changes, 1 in the 6 months before that (it was fixed before the change even reached users), and 2 in the prior 12 months (where our fix reached product in sub 10 minutes).