PMF is no longer something you "achieve"
PMF is no longer something you "achieve"; it's something you re-earn continuously. If last month's PMF can expire, what exactly were you congratulating yourself for?
A lot of teams still treat PMF like a certificate: you get it, you scale, you defend it with a roadmap.
That was a reasonable model when the product surface changed slowly, distribution channels were stable, and competitors shipped in quarters.
AI-native products don't live in that world. When OpenAI or Anthropic changes model behavior, your "best-in-class" flow can quietly degrade. When Apple or Google tweaks placement, onboarding that used to convert stops converting. And when users get used to a new baseline elsewhere, they bring that expectation back to you without warning.
So PMF behaves less like a milestone and more like latency-sensitive alignment: small drifts compound until they show up as support tickets, churn, and a suddenly "mysterious" CAC spike.
The teams that get hurt aren't the ones who ship slowly. They're the ones who ship durable plans for a moving target.
The uncomfortable part: "wrong but fast" can look like irresponsibility, right up until your durable roadmap becomes the risky choice.