Indeed. To give a bit of a potted history, in the early 1990s all night trains running through Germany were run by a co-operation of the relevant national railways, with each's locomotive and crew taking over at the border (mostly). They were run using ageing, non-air-conditioned rolling stock. They were classified as either D-Zuege (Durchgangs-Schnellzug - corridored express train) or EuroNight (a slightly higher quality of rolling stock, being the night version of the higher quality EuroCity day trains).
Later in the 1990s, DB and SBB got together to fund a joint operation, CityNightLine (no spaces), which was intended to be a high-quality "hotel train" operation centred on services through Germany to Switzerland. Later on this expanded to others - there was one to Vienna I used once from Salzburg.
They did live up to the quality concept, and a very pleasant "bistro" restaurant car with meals not dissimilar to the Scottish lounge car was provided. I recall enjoying breakfast as we went along the Rhine on one pleasurable occasion coming back from a summer crewing at the Zellhof Scout campsite in Salzburg, and wondering why anyone would ever want to fly. They operated compulsory reservations even in the seats to prevent there being overcrowding, which wasn't unknown on DB night trains in the seats due to the heavy military service traffic. If I recall rightly they were "Globalpreiszuege", with only dedicated tickets valid. Not such a big thing now, but was then when international CIV/TCV through tickets were the norm.
Roughly parallel to this (in about 1999 or 2000) DB decided the mainly D-Zuege weren't up to the quality concept, so (vested in DB AutoZug GmbH) they decided to give the routes all an upgrade, creating DB NachtZug. This was a near copy of CityNightLine with refurbished, reliveried coaches (still non-aircon in the seats and couchettes) and some new sleepers including Comfortline double deckers. They also had a few Talgo sets with passive tilt, which made for an excellent night's sleep - very smooth, and longitudinal couchettes which really worked for me - to this day the only good night's kip I've ever had on a night train, and I've been on a few! DB NZ wasn't quite as good as CNL, but followed the same quality concept and did reasonably well. It also introduced Paris-Bruxelles-Berlin/Hamburg services good for connecting with E* (previously these ran via Liege).
Later, SBB decided to pull out of CNL, and standards dropped a bit. DB then decided to rebrand all their night trains as CNL (with spaces, i.e. City Night Line), merging the two concepts down to the level of DB NZ. Since then there have been progressive cuts to the network, the final nail in my view being the removal of restaurant cars - the only thing that in my view makes the Scottish sleepers civilised is the lounge car, and long may it remain.
All those cuts after cuts, together with the difficult-to-serve distributed demand in Germany and low-cost flights, followed by the coaches taking InterRail type traffic, has led to their demise. But in the times of the 1990s network which gave me some enjoyable little adventures while over in Germany for university, I'd never have believed the UK would have been the survivors of the European night train system.
A sad day, but not a surprising one.
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For anyone who can read German (Google Translate won't work with it, it gets blocked) this is roughly the state of play as of 2000.
https://www.test.de/filestore/t2000...2195-4136-90d7-ad32ed63d6d2-protectedfile.pdf