Look at his tweet again. He says “now”. He posted it 20 hours ago. As of 5 hours ago, only 25% of the city is still without power.
It’s absolutely incredible that 9 months after invading a much smaller neighbor, After losing 10s of thousands of its own troops and thousands of its best military vehicles, Russia is currently retreating from territory it gained and is only able to impact Kiev with long range missile strikes. They’ve essentially fallen into the same failed strategy that Hitler resorted to toward the end of WW2. Try to terrorize your opponent’s civilian population by lobbing missiles into cities with the hope they’ll hit something significant. It will work the same as it did for Hitler. It simply cements the resolve of your opponent as they realize their enemy has no good intent for them and won’t go away until they are defeated. At this rate, Russia will end this debacle with a badly depleted military and the lose of Crimea. Brilliant strategy.