Key words right there. The relational model is a timeless mathematical model for data that gains both logical consistency and adaptability as a result. It has and will continue to stand the test of time.
And in practice it has a superpower: agility. The pointy haired boss wants your OLTP to be an OLAP, and you can kind of hack it. You want to put the user's birthday on the settings page this quarter? Sure. Even if that is in another table. You can even make it efficient.
