Meaning that the main viable use case for them now is intra-site navigation, i.e. the menu bar at the top of the page.
The normal use case are navigation, and call to action.
The web has become a kiosk with virtual magazines screaming for attention Commented with an application distribution platform (html/js)
We used to have applications and protocols. Now we have something similar to a mainframe, but the client app is distributed over and over again.
Forum? NNTP
Chat? IRC
Dole transfer? FTP
Status updates? Finger