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One problem I have with this is it violates the DRY (Don't Repeat Yourself) principle. The author embraces temporal inconsistency, but I'm not a big fan of it. Maybe inconsistency for content is okay, but for consistent DRY style I think I'd at least use CSS even if I didn't use a CMS.

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It violates that principle but on the other hand it embraces the RY (Repeat Yourself) principle which has its own set of pros and cons, the major pros being simplicity of implementation and reduced risk of retroactive breakage. I’ve found this principle very useful also in software design. The DRY principle gets all the attention but we tend to ignore the question of when it’s actually better to repeat oneself.

I agree, especially with the part about retroactive breakage. It’s very easy with static site generators; with just HTML and CSS, not so much.

I have 3 principles. The first one is KISS. The second one is DRY. This third one is that there is only 3 principles. DRY is less important than KISS. Sometimes, RY is a good way to simplify.

It's not a very good principle. It's not a very good principle.

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