Comment by atonse

If it involves Nextjs then we aren’t talking about the same category of software. Yes it can make a website pretty darn well. Can it debug and fix excessive database connection creation in a way that won’t make things worse? Maybe, but more often not and that’s why we are engineers and not craftsmen.

That example is from a recent bug I fixed without Cursor being able to help. It wanted to create a wrapper around the pool class that would have blocked all threads until a connection was free. Bug fixed! App broken!

I would never use, let alone pay for, a fully vibe-coded app whose implementation no human understands.

Whether you’re reading a book or using an app, you’re communicating with the author by way of your shared humanity in how they anticipate what you’re thinking as you explore the work. The author incorporates and plans for those predicted reactions and thoughts where it makes sense. Ultimately the author is conveying an implicit mental model to the reader.

The first problem is that many of these pathways and edge cases aren’t apparent until the actual implementation, and sometimes in the process the author realizes that the overall app would work better if it were re-specified from the start. This opportunity is lost without a hands on approach.

The second problem is that, the less human touch is there, the less consistent the mental model conveyed to the user is going to be, because a specification and collection of prompts does not constitute a mental model. This can create subconscious confusion and cognitive friction when interacting with the work.