The "Comparison with Related Libraries" section is notably missing comparison against aeon and sktime, which also aim to be the kind of holistic time-series library like Merlion.
Also, when saying "Nixtla" do they mean TimeGPT or one of their other libraries? Because the former definitely supports exogenous regressors, while they say it doesn't.
I personally prefer Darts because it's very user-friendly, and the devs are responsive,