I use Quarto for most of my academic and personal writing. It is flexible, well-documented, and supported by open source and some great developers at Posit.
A lot goes into a dissertation and famously the documents themselves don’t tend to get a lot of attention.
Northwestern Thesis Format
The Graduate School at Northwestern has detailed formatting criteria they require for dissertations, yet no official LaTeX template.
I created a template as an extension that provides:
A LaTeX template compliant with the TGS formatting requirements
An experimental Typst template. Note that this probably is not useful yet for an entire dissertation because Quarto does not support book-like structures for Typst documents.