They are not out of production!
https://shop.chessbase.com/en/categories/chessbase
You can find the Mega Database, Big Database, Openings Encyclopedia, Correspondence Database, and Powerbooks and Powerbases based on a single specific opening (these sound like they may be what you are looking for, like the powerbases are not 8 million games of everything, but rather, maybe 50 thousand of a single opening, like the French or Nimzo-Indian or Dutch).
85000+ of the games in the Mega are annotated, the big is not (the main difference between the two).
Perhaps the format is slightly different than the 1990s, but it is all there.
Hello, friends. Does anyone have old chessbase opening databases. If not,can you please tell me where to find them, given that they are out of production. Thank you.