Patrick McKenzie

If you are attempting to hire for an engineering position, greater than 50% of people who apply for the job and whose resume you select as "facially plausible" will be entirely unable to program, at all. The search term for learning more about this is FizzBuzz.

Software companies in B2B which aspire to growing quickly will eventually spend more on sales and marketing than they do on engineering. You can read S-1s of successful IPOs and calculate the ratio; it is sometimes 2X++.

The chief products of the tech industry are (in B2C) developing new habits among consumers and (in B2B) taking a business process which exists in many places and markedly decreasing the total cost of people required to implement it.

There is no hidden reserve of smart people who know what they're doing, anywhere. Not in government, not in science, not in tech, not at AppAmaGooBookSoft, nowhere. The world exists in the same glorious imperfection that it presents with.

Significant advances shipped by the tech industry in the last 20 years include putting the majority of human knowledge in the hands of 40%++ of the world's population, available on-demand, for "coffee money" not "university money."

Weak-form efficients market hypothesis is a good heuristic for evaluating the public markets but a really, really bad heuristic for evaluating either technical or economic facts about tech companies, startups, your career, etc etc. Optimizations are possible; fruit hangs low.

Startups are (by necessity) filled with generalists; big companies are filled with specialists. People underestimate how effective a generalist can be at things which are done by specialists. People underestimate how deep specialties can run. These are simultaneously true.

Most open source software is written by programmers who are full-time employed by companies which directly consume the software, at the explicit or implicit blessing of their employers. It is not charity work, any more than they charitably file taxes.