Ng: AI turns software architecture decisions into reversible two-way doors
Andrew Ng · Andrew Ng: Building Faster with AI · Y Combinator · Jul 10, 2025 · at 13:55
Andrew Ng discusses Jeff Bezos' concept of one-way versus two-way doors and how AI-assisted programming makes tech stack choices easily reversible.
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“So choosing the software architecture of your tech stack used to be a one-way door. Once you're built on top of a certain tech stack, you know, set a database schema, really hard to change it. So that used to be a one-way door. I don't want to say it's totally a two-way door, but I find that my team will more often build on a certain tech stack a week later, change your mind, let's throw the code base away and redo it from scratch on the new tech stack.”
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