marimo notebooks are actually DAGs as cells, reusable out-of-the-box in three diffferent ways: as interactive computing notebooks in a reactive environment with

marimo notebooks are actually DAGs as cells, reusable out-of-the-box in three diffferent ways: as interactive computing notebooks in a reactive environment with no hidden state, as Python scripts, as data apps. So Jupyter + nbconvert (or perhaps you meant jupytext) is not a replacement for marimo.