Mr. Benton,
City Night was one of the several successors that the European roads established in the wake of
Wagon-Lit folding - at least its Sleeping Car operations (the company lives on with various hospitality enterprises) as an instant withdrawal of sleepers would have been "too much cold water" (much as the Amtrak LD trains were just to be there for a five year "ease the pain" period).
Other entities included TEN (Train Euro Nicht/Nuit) and the French SNCF also had one for internal routes such as Paris-Nice.
My rides in Wagon Lit cars were July '60 Paris-Stuttgart, Sevilla-Barcelona May'90, as well as DB "Schlaffwagon" Berlin-Aachen, and Paris-Frankfurt. Intended also was Madrid-Sevilla May '90 but that ended up in a Couchette, which was unlike any experience I have had before or would care to have again.
Finally, again I note, the OBB "Oberfuehrers" proved me wrong, as I never expected to see NightJet "make a go of it". But apparently it has.