From what I can tell, Quarto is essentially an installer for Knitr/R, that also comes with a bunch of goodies, like when working in VSC (or Rstudio) it auto-suggests cross-references to content in the document, like figures/chapters/equations/etc. It also has a github action that builds and deploys the site in like 1 one line. Just removing the friction and lowering the bar is very helpful sometimes.