The title pretty much says it! I’d like to explore that idea a little and would love to hear y’all’s recommendations. This thought was originally inspired by lord of the rings, but I’m also currently on a little nostalgia trip by reading The Sea of Trolls and the soft magic system in that is pretty fun
The Riftwar Cycle might fit. The magic system starts off with the users having a hard understanding of how magic works only to learn how soft and pliable it really is.
That said, this series is like 30+ books and is put it at half of them being really good and half being a grind while nearly all of them are dated in fantasy style.