They claimed that they'd need a different implementation per distribution. Which makes no sense. It's just open()/ioctl_tty()/read()/write(), all of which are in the libc of every distribution that has ever existed since the 90s.
>>bombol+(OP)
Fair, I'm putting charity to the claim and assuming that they coded against a Microsoft toolchain. That is, my assumption would not be that it was the different distros, but that is just an easy thing to say.