Exporting = one-way door
File over app = two-way door
Do not mistake the map for the territory.
Many apps allow you to export your data. That's better than nothing, but not the same as editing files directly. An export is a representation of your data. It's an output of the source. It's a one-way door.
The file over app philosophy does not make a distinction between data and file. Both are one and the same. The source is the output, and vice versa. It's a two-way door.
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