[Koshkin]

Well, the hominins made their tools for themselves. Software engineers making tools for themselves is a rare exception.

[AlotOfReading]

Pretty much all of programming is constant toolmaking, usually much more abstract and sophisticated than anything in the article. Every subroutine, utility function, library, and interface, for example.

[mr_toad]

I doubt most tool makers make tools for themselves. The guy at the hammer factory isn’t using all those hammers.