Not A Kit is upgrading its web technologies! The human explanation is that the new site will load faster, have greater security features, and make things easier for your instructors.
The nerd explanation involes things called dynamic content management services (think Facebook) and the advantages of Static Site Generators. Static Site Generators are faster, more efficient, and are by their very nature very difficult to exploit compared to the other kind.
The page is set for re-opening in June.