[tahoemph999]

Before the industrial revolution or so somebody coming up in a craft would build a chunk of their toolset as part of that process. Even today many good (not necessarily software) engineers build some of their own tools. AI has made it much easier to build tooling to make your life better. Maybe some could be sold. But that isn't the intent and, as others have noted, can take significant additional effort.

I have my own "bandsintown" for example because I want to avoid the advertisement shitshow. I have a number of very specific tools for building software. I doubt I ever package up any of this for use by others much less try to monetize it.

That is the vibe I got from this article. This is a good concept to have in your (meta) toolbelt.