[flatroze]

I think there's an issue with opening a tar file, e.g. if sent to someone who needs to view the document but isn't techy.

It seems to me that having one file that any browser can easily open (and not require Internet connection to view) is a big advantage over having a directory with assets alongside the .html file. It may be one of those things that make things easier yet nobody really complains about how things are usually done when the page gets saved. I hope more browsers add support for saving pages as MHTML in the nearest future so that we wouldn't need tools like this one.