There's a deeper issue. All language (and code and other things in the GPT/etc corpora) seem to have something in common - hierarchical, short- and long-range s

There's a deeper issue. All language (and code and other things in the GPT/etc corpora) seem to have something in common - hierarchical, short- and long-range structure. In contrast, there is nothing that all time series have in common. There's no way to learn generic time series knowledge that will reliably generalise to new unseen time series.