Read the sources through four stakeholder lenses

Read this notebook through four different stakeholder lenses. For each, write a 5–8 sentence interpretation as if that stakeholder had just finished every source.

The four lenses:
1. Founder / operator — what does this change about what to build, ship, or stop?
2. Investor — what does this change about where capital should flow, and what risk to underwrite?
3. Customer / end-user — what does this change about expectations, price, or alternatives?
4. Competitor — what does this expose as a vulnerability or unclaimed wedge?

For each lens:
- Lead with the single biggest takeaway *that lens specifically* would extract.
- Quote one specific line from the sources that lens would highlight.
- Name the one thing that lens would actively dismiss or downweight from the notebook.

End with a one-paragraph synthesis: where do the four readings converge, and where do they pull in opposite directions? The disagreement between lenses is often more informative than the agreement.