Partly because the whole WYSIWYG Website editor market is gone. ( At least that is what I think happened )

I mean even Microsoft didn't bother with Front-page after a while. After that was the blogging era. Movabletype or something perl.

I have been thinking if we will see WYSIWYG editor back, moving back the whole editing to client side. You simply upload a single page fully embedded HTML.

This has got to be simpler than whatever solution that is out there.