alt Hacker NewsThis adds a new validation method that people can use if they want. The existing validation methods (https://letsencrypt.org/docs/challenge-types/) aren't going away, so your current setup will keep working.
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newsoftheday • yesterday at 8:20 PM
This is good news, not sure I got that from reading the article but even if I had to do it, it wouldn't be the end of the world I guess.
And to elaborate, the reasons you might want to use a DNS challenge are to acquire wildcard certificates, or to acquire regular certificates on a machine or domain which isn't directly internet-facing. If neither of those apply to you then the regular HTTP/TLS methods are fine.