Alex Rossie
I build companies and I fly aircraft. I write here about AI, markets, and history.
- What the S&P 500 admits about AI (when the SEC is reading)
MIT FutureTech scored 510 S&P 500 firms on ten years of 10-K filings, the annual report a CEO personally certifies. Adoption quadrupled in three years, margins show a J, productivity shows only the dip, and the record cannot yet tell a payoff in transit from one that never comes.
- The nervous system of your codebase is a markdown file
A census of 2,853 repositories shows the file coding agents actually read is a plain markdown context file. Code is the musculature; the context file is the nervous system, and it earns its keep carrying the constraints the code cannot say about itself.
- Nobody designed the landing gear to talk to the rudder. A crack did it anyway.
A fatal training crash at Parafield, an emergency order from EASA, and what the FAA's DA42 directive actually writes: a ban that dies at the first inspection, and a cycle meter that survives it.
- America's largest builder owns the mortgage, the title company, and the price. One in five buyers still walk. They walked in the boom too.
D.R. Horton owns the price, the schedule, the mortgage, and the title work, and it still loses a fifth of its signed buyers, in boom and bust alike. A decade-old cancellation floor is the cleanest evidence yet against the proptech pitch to fix the transaction.
- The model writes anything. That is exactly why your stack matters more.
The popular take says AI writes any language, so your stack stops mattering. It is precisely backwards: the moment writing code went nearly free, the axis flipped from easy-to-write to easy-to-prove, which is why static typing and opinionated frameworks win.