You're going to be asking this same question a lot going into the future.

Perhaps that means it's not a question worth asking?

I think there is some value in asking these questions. Maybe a better question would be how much effort and time was put into a project.

1. Maintenance: Projects that (seem to) have the same quality and complexity but were built over months or years by hand versus built with an AI tool in a weekend will probably experience different amounts of maintenance in the future. This is, of course, not a black-and-white rule. But simply knowing that people think a project is worth spending months or years on gives me an indication that they probably want to keep it alive in the future.

2. Testing: Projects developed by hand probably underwent a lot more hidden manual testing—maybe on different hardware, maybe by more than one person. Since my personal projects have gotten significantly more complex with the availability of AI coding assistance, I spend much more time writing prompts and thinking about integration testing. But this is not the case for all projects.