Actually, Closed Minded literally means "having a mind firmly unreceptive to new ideas or arguments" as opposed to "Not wanting to use a 3rd party library".
I worked for a boss who didn't want to use 3rd party libraries because he was unreceptive to new ideas or arguments. His main argument was "I don't want them because I don't know them". Very harmful for a dev team who wanted to work fast and efficiently but didn't want to reinvent a wheel. Actually, we HAD to reinvent a wheel because our boss didn't know any 3rd party library which could speed up our work (and we did).
I worked for a boss who didn't want to use 3rd party libraries because he was unreceptive to new ideas or arguments. His main argument was "I don't want them because I don't know them". Very harmful for a dev team who wanted to work fast and efficiently but didn't want to reinvent a wheel. Actually, we HAD to reinvent a wheel because our boss didn't know any 3rd party library which could speed up our work (and we did).
Hey man, I think you need move to a new place 🤣
Hello, moved almost two years ago ;) actually whole dev team left.