This sums up quite well why excluding test files from npm bundles is not a great idea - https://github.com/feross/is-buffer/pull/9#issuecomment-216204167 …
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For us who do not have reliable internet access, not being able to view docs and tests (as a fallback) is a severe hindrance
npm package footprint could definitely be optimized, but in my opinion that shouldn't be the concern of packages; pnpm has the right ideas