The reliability isn't great though. "Elevated Rendering Errors" almost always is "increased errors rendering uncached derivative images". Basically any image variant - by file and transformation/dimension parameters - that hasn't been viewed recently won't load. So a srcset homepage hero image probably has all size variations a user might see in Imgix's cache, and will render. But on less-traveled parts of our site, photos generally won't load. We're a rather image-heavy site and it's pretty debilitating to the UX when this happens, so it's frustrating that this happens more than the "almost never" rate we'd wish for. FWIW, we've never noticed problems on their end that aren't closely followed by an incident report in their status page, so they're not under-reporting at least.
