The Disappearance Test: Would the World Be Different Without Your Product?
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Collected in Robin Shen’s Field Notes · Content type and attribution are shown above
English translation of the Chinese post originally published 2021-05-01. Translated 2026-10-31 with AI assistance. Historical figures and claims have not been updated or independently verified. 中文原文
Reading guide
Robin identifies three questions founders need to clarify: how strongly target users need the product; whether users could easily switch away without noticing its absence; and whether losing it would cause major inconvenience. The less replaceable a company is, the more valuable it becomes. He includes Wu Jun’s response to a reader asking why Evernote struggled. Wu argues that the product was not essential enough and its timing was squeezed by Google Docs and Office. Robin says their views are similar.
Key points
- The intensity of demand determines whether a product can gain traction.
- If users can easily switch when your product disappears, it lacks necessity.
- The less replaceable a company is, the more valuable it becomes.
- Wu Jun’s views on Evernote are externally quoted; figures and subsequent speculation have not been independently verified.

Full text — English translation
These articles are personal notes, book excerpts, and collected reprints. Figures and events reflect the time of the original publication, are not current information, and do not constitute investment advice.
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