I would say you are not their target market - you have specific hardware needs a tiny fraction of the overall population have. It's been ages since I last used a parallel port to control external devices from a computer. When I do so, I use an $10 RPi-like board and its GPIO pins. I don't do hardware for a living, but I write software and this machine seems perfectly good for that. In fact, it's a bit of an overkill.