Not all the world is HTTP and/or web stuff. For a lot of things changing domain is quite a hassle, and the old domain will still be around, cached, and conside

Not all the world is HTTP and/or web stuff. For a lot of things changing domain is quite a hassle, and the old domain will still be around, cached, and considered valid (because its ttl hasn't expired yet). I agree with GP in saying that a short TTL never created too much issue. Now, to come to the original issue: short ttl. What do you expect, in this day and age? With all this cloud stuff going up and down, being created and destroyed again and again, ephemeral stuff that doesn't even last a whole single day... Of course you need a short ttl.