I'm chalking this up as another car we never got in the States because of strange circumstances. And today, Buick sells some interesting Opels-badged-as-Buicks like the Regal GS (an Insignia) and the Verano (sort of an Astra sedan). They feel relatively German, which is an unusual thing for any product sold at a GM dealership here. I'm still waiting for that Astra GTC, which is kind of the Calibra of today. Something tells me that badging a hatchback so sleek and aggressive as a Buick might not work, though.
The origin of the lightning in the 2012 Opel logo lies in the truck Opel Blitz (German Blitz = English "lightning"), which had been a commercial success, widely used also within the Wehrmacht, Nazi Germany's military. Originally, the logo for this truck consisted of two stripes arranged loosely like a lightning symbol with the words "Opel" and "Blitz" in them, in later, 1950s models simplified to the horizontal form of a lightning which appears in the current Opel logo. The jag in the lightning always follows the original from the "Opel Blitz" text stripes, in the form of a horizontally stretched letter "Z".
As a German living in Germany, I join in the question “Where did they all go?”. Even in Germany you won`t find many Opel Kadetts “A-D”, the D-Kadett was built until 1984, being regularly driven anymore. Even at classic car shows that my wife and me attend with our cars you are sure to see at least about 30 vintage Porsche 911 or Mercedes SL for every Opel Kadett oder rear-wheel-drive (built until 1980) Ford Escort.