I work for a company that builds most of its intranet with Microsoft FrontPage. I build and manage internet sites with it.
FrontPage put website-managing capability into the hands of people who were unable or unwilling to learn to code everything by hand. There's a lot to be said for the WYSIWYG interface. It's great if someone can code up a site with Notepad, but it's not the only way to do things, or even the most efficient.
A couple of our local school websites that I manage, formerly with FrontPage, have been converted over to a CMS system, and it is *not* a good change. The sites are much slower even for browsing, and editing is very, very slow and clunky, and I can only do a small subset of the things I used to do before. It is not progress.