Yeah I'm out of it now too. You still have the same issues running PLCs. I've had to find old ass network cards on EBAY. I understand why PLCs are used. I turned down a project building a machine using Arduino's and raspberry Pi's because it was inappropriate for the application. But there is definitely a subset of manufacturing equipment that doesn't require PLCs. I've already seen it happening scanning networks and seeing devices show up with RPi MACs.