the pattern across four decades
Each generation solves the previous one’s pain — memory safety, then concurrency, then type safety, then intent — and inherits the previous generation’s compromises.
§ 02 — Eras · ∞
What’s next
version 0.1 — someone, somewhere, is typing it now
Left: era context, features, and the 101 hello. Right: 2 deeper 201 lessons, the factorial specimen, and where What’s next lives today — each column scrolls on its own.
The problem it solves
Whatever the next wall is — energy, correctness, AI-native semantics — someone is writing version 0.1 for it right now.
The problem it carries
Every era in this guide believed its language was the last one. None has been.
Key features
- unknown, by definition
- But the shape of the last three decades points one way: less syntax, more intent, more machine.
- the constant
- Every era’s new language announces that it ends the story. None has yet.
- the live constraints
- Energy, verification and AI-native semantics are the pressures the next language will answer.
101First contact — hello world. 201 — 2 lessons on mechanisms you meet after the factorial specimen: the sharp edges practitioners actually use.
201 — going deeper
The 201 assumes you have read the 101 and the specimen. Each lesson is one mechanism — what it is for, how it looks in code, and the trap or payoff that makes What’s next distinctive at scale.
what the next one inherits
Whatever comes next will carry today’s syntax, today’s libraries and today’s performance problems, exactly as every language here carries its parents.
The specimen — factorial
The blank page: every era in this guide began exactly here — version 0.1, somewhere, right now.
// version 0.1 — someone, somewhere,
// is typing the first line right nowRun it today
No install. Open a new file and write version 0.1.
Where it is now
Every era in this guide began exactly here. The constant, eighty years running: the machine keeps getting cheaper, words keep getting more powerful, and whoever writes the next version 0.1 gets a section in guides like this one.