[hamburglar]

This is a good point. There are probably lots of people on HN working in cloud environments where your dependencies are actually organizationally within your control. If one of your dependencies makes a change that breaks you, you can escalate the problem and compel them to roll back the change. This is the luxury of building the entire world. My service depends on nothing that can't be escalated to my own VP, so "roll back to the old version [of whatever changed]" is a very satisfying answer, but it's not an option when your dependencies aren't obligated to keep you running.