One saving grace is that if a cyber attack was bad enough, it would likely result in retaliation in the physical space, provided attribution could be proven. Superpowers generally have armed forces far superior to asymmetric attackers and would be able to inflict punitive damages far beyond the cost of the initial cyber attack. There is some deterrence against some of the worst attacks eg: knocking out a power grid.
If you look at the pattern of really nasty cyber attacks against infrastructure and industry, they usually are the other way around. Stuxnet was the US attacking Iran, Ukraine was attacked by Russia.
If you look at the pattern of really nasty cyber attacks against infrastructure and industry, they usually are the other way around. Stuxnet was the US attacking Iran, Ukraine was attacked by Russia.