We used to love riding in them at our university in the late 80s/90s. And when you proceed to ride over the top will the car flip upside down? We managed to scare at least one of our classmates into believe this could happen. The whole thing felt as exciting as a carnival ride in retrospect ...

despite that, it looks like the reason no new paternosters are built and existing ones are removed is safety. unfortunately this is considered to be more important than cultural heritage protection.

i have used one at the university of vienna. sadly it was removed almost 20 years ago.

I also used these ones in Edinburgh decades ago, and the same model at Leeds uni which was a similar vintage. The Napier one there is a story about a lecturer convincing two students it went upside down and if you tried to loop the loop you had to stand on your hands to do the transition... much hilarity when they appear upside down on the other side.