Sometimes I think the 'deep web' is just websites that aren't indexed (or poorly indexed) by Google.
miniblog.
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zsh is generally wonderful, and it's sufficiently like bash/POSIX sh that it works.
However, it uses 1-indexed arrays, whereas bash uses 0-indexed arrays. This totally caught me out.
Designing tensors so dimensions are indexed by name rather than number, even adding a concept of privacy!
Google prefers to index newer pages: https://stop.zona-m.net/2018/01/indeed-it-seems-that-google-is-forgetting-the-old-web/
Perhaps people want newer results more often? The article suggests there's probably a limit how much can be indexed for immediate retrieval.