Every product accumulates features the way a desk accumulates clutter: one reasonable decision at a time. Each addition seems harmless. The sum is a mess.
The feature you should not build is usually the one a single loud customer wants and nobody else will use. Saying yes feels generous and costs you focus.
Subtraction is the underrated half of product work.
A Test Before You Add
Ask whether the feature serves the core user or just silences a complaint. They are not the same.
Every yes is a no to something better.