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A 1977 Time Capsule, Voyager 1 runs on 69 KB of memory and an 8-track tape recorder
(techfixated.com)
This is a most excellent place for technology news and articles.
Had been thinking the same at first.
But France and Austria did work. Only Germany was blocked.
Only thing that is unique to Germany I can think of is the hate speech laws that are very specific towards Nazi symbolism and Holocaust treatment.
Maybe they had some article (or comments from users...) once that collided with that and decided to just block Germany to make their life less stressful.