Very interesting dive into where this theory comes from and how wrong it is.

A database we take for granted... but if you look in the margins it's full of history and very well crafted.

Definitely an excellent list to have in mind as soon as you get to engineering management. The four areas listed are the most important.

If you got to implement an OAuth integration. Please be responsible and don't do this... this could lead to very serious breaches for your users.