Google is massively run on databases, but that topic isn't as popular in media (or on HN). I think a big part is that it is such a highly visible topic that is also very romanticized, partially because its a field where serious inroads have been made (at least compared to expectations and last generations science fiction)
AI has emerged as one of the most impactful disciplines in science and technology. Google, for example, is massively run on AI.