Unless you have insight into the end users DNS deployments I would say this is the appropriate amount of caution to apply. Besides just TTL being low, a freque

Unless you have insight into the end users DNS deployments I would say this is the appropriate amount of caution to apply. Besides just TTL being low, a frequent issue I had when first migrating to AWS years ago was CNAME to CNAME records not resolving among some end users. Primary schools were the worst offenders, I assume some of them still have Novell deployed.