Good parts for good business

1. Why bad parts exist?
2. Bad psychology:
3. Use all features
4. Feel swag in writing cryptic/magic code

Change title to:
Engineering for Product market fit

https://excalidraw.com/#json=4uUA0hRxIpvuSSymw_S5v,nnQBwwkFyUBy4KfDHb3FFg