The size for `sockaddr_storage` is not defined by POSIX, but `sockaddr_un` is defined, and you can't just change the `sun_path` to a pointer, so to increase `sun_path` you would have to increase the `sockaddr_storage` struct size. This comes with other downsides, first is incompatibility with other OSes, most OSes seem to be around 104-109 bytes. Second new problem would be that with any larger value each socket call would have to copy more data, even if they are not unix sockets. If you change it to something that looks sensible like `PATH_MAX` you end up increasing memory requirements for any application that works with sockets.