

There are lots of reasons to use really low TTLs, but most are a temporary need. Most of the times I had to set low TTLs for records were for hardware migration projects where services were getting new IP addresses. But in a well managed shop this should always be temporary. The TTL would be set low the day before the change, then set back to a normal value the day after the change. I feel the author is correct in that permanently setting low TTLs just covers up a lack of proper planning and change management.
The only thing off the top of my head that I can think absolutely requires a permanently low TTL is DNS based global load balancing for high uptime applications. But I’m sure there are other uses. I agree that the vast majority of things do not need a low TTL on their DNS record.



Because legal discovery data retrieval is almost entirely automated. You are always going to end up with some irrelevant shit in there because it matched a keyword search somebody used for discovery.
Source: I used to do this when companies I worked for got subpoenas for email data.