At these prices, cyber attacks are much cheaper than cruise missiles but too expensive for most criminals/terrorists without an explicit objective. You'd expec

At these prices, cyber attacks are much cheaper than cruise missiles but too expensive for most criminals/terrorists without an explicit objective. You'd expect state actors to use these attacks to achieve a particular goal, where the cyber attack option is weighed against the cruise missile option. Permanently destroying a power grid doesn't make a ton of sense for any reasonable objective other than total war.