Filesystem is best when there is a single writer and many readers. If you have bunch of files and don't have any structure, yes filesystem is great but the mom

Filesystem is best when there is a single writer and many readers. If you have bunch of files and don't have any structure, yes filesystem is great but the moment when you need consistency & performance (which you need sooner rather than later) use databases. Investing early doesn't hurt when you build a product that you know will have many writers.