I looked into Hugo but stuck with WordPress because the transition of 2M posts with 1,000+ daily new posts seemed too much for the build process:

https://discourse.gohugo.io/t/transition-2m-posts-from-wordp...

Hugo is indeed a great tool. I like it because I can write all my content in Markdown and have full control over how the site looks. Editing a Hugo template, or creating my own, is also much easier than it is in WordPress.