I used to work at a place that tried to reinvent everything from the wheel up, too. Over time I came to realize that avoiding third party libraries and technolo

I used to work at a place that tried to reinvent everything from the wheel up, too. Over time I came to realize that avoiding third party libraries and technology stacks was more about long term support and hackability than anything else. Unfortunately, newer recruits never realize this and accept the internal stack as religion. They never bother to learn third party alternatives. We had a joke that went: "If you were ever fired and had to find a job elsewhere, you'll have to start by implementing your own X", X being a heavily used internal library that allowed an entire generation of developers to do certain things without ever knowing the underlying system calls.