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Implausible yes, but to say it ruined the show? Not a chance. If you really think that way then just quit watching all of the Marvel shows/movies and don't bother to post on them anymore.
More to the point, DVD sales didn't surpass VHS until 2003. The idea that an Eastern Bloc country would have sitcom DVD sets so readily available in 1999 is just too implausible and has frankly ruined the show, and really all of the Marvel Cinematic Universe. It was a good run.