Why do you think language is so special? There's an extensive body of literature across numerous domains that demonstrates the benefits of Multi-Task Learning

Why do you think language is so special? There's an extensive body of literature across numerous domains that demonstrates the benefits of Multi-Task Learning (MTL). Actually I have a whole folder of research papers on this topic, here's one of the earliest references on hand that I feel captures the idea succinctly in the context of modern ML: “MTL improves generalization by leveraging the domain-specific information contained in the training signals of related tasks" [Caruana, 1998] I see repetition and structure everywhere in life. To me it's not far fetched that a model trained on daily or yearly trends could leverage that information in the context of e.g. biological signals which are influenced by circadian rhythm etc. Disclaimer: my background is in ML & bio-signals, I work with time series too much.