An RDBMS is not the best data store for all data. Sometimes flat files or other are the simplest tool for the job, as shown in the article. Adding a database to any of those tools would definitely not be worth the trade-off.
My statement assumed that as a starting point. To be fair, the decision to use a database or other format, given a reasonable amount of experience, is also a fairly quick thought process. By the time I open my editor to write my first line of code I’ve already made my choice.
