[citrin_ru]

Absolute secure system is absolutely not practical. Good security is always a tradeoff. Sacrificed performance means increases resource usage - more chips and more energy per unit of computation and while humanity still burns coal/carbohydrates to make electricity increased CO2 emissions can be too high price to gain marginal improvement in security. Even if electricity is free of negative externalities we still have limited resources and need to think if better to allocate them to improve security or something else.