Un buon promemoria da Chris Coyer, di CSS Tricks:

There are two kinds of HTML:

• HTML that makes up templates
• HTML that is content

I feel like some discussions about HTML are clouded by not making this distinction. […]

It’s not impossible to change content, but it’s likely much harder and more dangerous.

Websites can last a long time. Content tends to grow and grow. For instance on CSS-Tricks there are 2,260 Posts and 1,369 Pages. Over the years I’ve sprinkled in classes here and there to do certain stylistic things and over time I always regret it.