Every tool was built for someone, and that someone was usually not everyone.
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Software is not built in a vacuum. The expensive laptop, the second monitor, the quiet home office, the steady electricity — each of these is a default the builder did not always remember to question.
Users on bad networks, shared devices, cheap hardware, and irregular power are not edge cases. They are most of the people on earth. Designing for them last is designing for them never.
The default user in your head has a class. Notice whose.
