> If the post were just some HTML and CSS, it should be able to be served with very little processing power. Actually, with caching - they are. The database is

> If the post were just some HTML and CSS, it should be able to be served with very little processing power. Actually, with caching - they are. The database is there so that the person writing the blog post doesn't need to be very technical, or maybe so that they don't need to make a special effort just to update some post. In the end everything is about convenience.