Honestly, I see him mostly as a power fantasy template these days, especially in web serials and LitRPG. There's this whole subgenre of 'reincarnated as Sun Wukong' or 'system grants me his powers' on platforms like Royal Road. He's less a nuanced character and more a set of overpowered skills to be acquired: the 72 transformations, the cloud somersault, the clone technique. It feeds directly into that progression fiction craving for ultimate, flashy power scaling.
You can spot the influence in cultivation novels too, where the 'lawless, heaven-defying' archetype is basically Wukong with the serial numbers filed off. The rebellious spirit gets amplified, but the trickster charm and the journey towards wisdom often gets lost. It's a bit shallow, but it clearly sells.
My favorite exception, though, is 'The Monkey King's Daughter' by T. A. Miles. It blends that iconic power with a more contemporary, almost urban fantasy family dynamic, which feels fresh.