[kyllo]

Darts isn't a specific model, it's a wrapper API for a wide variety of forecasting models, and Prophet is one of them. Other models may or may not outperform Prophet depending on the nature of your specific application and your time series data. You really have to test them to know. And Darts facilitates testing many models on the same data by putting them all behind the same API.

Also, Prophet was developed by a very small number of individuals at Facebook, it's not something they invested massive resources into.