This makes you wonder if we might see a resurgence in old school control systems without processors, and def no networks. The Manhattan project was able uranium purified to get a bomb working without PLCs and networks. All else being equal it's more expensive, but not compared to being unable to keep your network safe from attack. You need to reconfigure the line? Send eight techs down one by one to set new parameter…
It's interesting that the Manhattan project had to build everything themselves - which if Iran was NOT using off-the-shelf parts and instead was developing everything in-house they'd be less susceptible to certain types of attacks.