What I mean is: do Arch Linux developers use Arch Linux to develop Arch Linux? Do Ubuntu, Fedora, Debian, and others do the same? Or is it a case of “the cobbler’s children have no shoes”?
It seems obvious, but it may be more complicated than it appears.
I imagine there is both scenarios happening.
Take for example, Apple. They have Mac /MacOS but for a long while ( I can’t confirm currently ) they were using Windows PCs to design their products–even though their CAD software they used had a Mac version.
A bit of ancient history, the early Macintosh operating system & applications were written on Apple Lisas. Native Mac development tools weren’t released until late 1986.