I think if you are happy with the workflow/output you have there is no reason at all to change. w/r/t to websites and books we have put a lot of investment into features for both (https://quarto.org/docs/websites/, https://quarto.org/docs/books/). If you compare books with Bookdown vs. Quarto vs. JupyterBook I think you'll find that each does some things better than the others (so again if you are happy w/ your existing tools no reason to change).