It's only "retroactively" changing "the rules" because "the rules" are an instance of regulatory capture limiting the policing of externalities to only ones that have been enumerated. Otherwise the general principle is that if you cause harm to other people, you are responsible for that harm. And industrial noise at all hours of the day is harm.

You'll get zero argument from me about the need to build more power plants and transmission lines. But this of course must be done with proper compensation to those affected, not just a regulatory giveaway after finding some disenfranchised area. In fact one might say that such regulatory giveaways have artificially lowered the expected cost of building a new plant below the actual cost, thus discouraging investment at the true cost.

You can also look at the onerousness of permitting processes (etc) as a result of a regime whereby once something is built, if it causes problems then nobody can do anything about it.