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> 2: Don't use a DB. Use human-readable text files

This is interesting, can you elaborate? Do you mean like CSV files, or some JSON structure, etc?

Depends on what you want to build.

I do use CSV and JSON for some types of data, yes.

Sometimes I use YAML. Sometimes just free text. Sometimes I roll my own format.

this also holds true for serialized vs plain text data (json, csv, or roll your lang + parser : ))