Greetings. There many WordPress plugins which convert the blog into an epub ebook for offline reading. So there certainly is demand for download a website once and read forever even without internet. There is excellent search, font resizing, soothing page background colors, brightness settings, go to navigation, thumbnail navigation, table of contents, bookmarking, notes, etc. features in almost all ebook readers nowadays like iBooks, Google Play Books, etc. etc.
The epub format is also based on xml/html etc. So if any time in the near or far future if you can kindly add this awesome feature in Publii of exporting all the posts in a blog into its own epub ebook with the post titles showing in the epub TOC. It would blow all the ebook publishing softwares out of the water because in Publii we are getting a very pretty (many themes) static html seo-optimized website also as a very huge bonus.
So just write once in Publii and publish it as a fast website and a epub in one shot.
You could even charge for this Publii epub export as a premium feature which all of us who need it can pay for. I am also willing to donate to support the development of this epub export feature. Thanks.