This site was originally made with Drupal. That was very nice for a while. Eventually extensions, data backup and installation processes became a hassle. To keep surprise maintenance to a minimum, the site was re-written with Flask. Since long-term low-maintenance is the main goal on this rewrite, I've stuck with well-maintained tools and stayed away from fancy things.
Disclaimer: I'm not experienced with any of the tools being used here. So don't take it as best-practice if you're learning, and be nice when judging it.