alt Hacker NewsWhen you shoot yourself in the foot with DNSSEC, you typically end up with a non-working setup.
The biggest problem is that DNS replies are often cached, so fixes for the mistakes can take a while to propagate. With Let's Encrypt you typically can fix stuff right away if something fails.
When you shoot yourself in the foot with DNSSEC, your entire domain falls of the Internet, as if it had never existed in the first place. It's basically the worst possible case failure and it's happened to multiple large shops; Slack being the most notorious recent example.