You're completely right. This model, as with any other predictive model, is subject to degredation in performance when the data-generating process changes. But

You're completely right. This model, as with any other predictive model, is subject to degredation in performance when the data-generating process changes. But given MetNet-2 came out in 2021, they'll probably release an updated version before the performance degrades due to changes in weather patterns.