12 destroyed. Hard to tell if the others were only damaged, and of course, how badly.
The first casualty of war is the truth.
That being said, any sort of materiel loss on weaponry as important as strategic nuclear bombers is a massive problem for Russia. The logistics of repairing them, if possible, is going to be complex.
Do you know how many they still had operational? Not that many, somewhere between 50 (more realistic) and 100 (rather idealistic if the rest was fully gutted for equipment).
This was a massive damage, not directly interfering with war against Ukraine that much, but overall power projection. Plus a pretty good insult to russian's FSB and GRU services who had no clue, just like today's Crimea bridge blow.
I do not want to give any credit to russian secret service but as we have seen in 9/11 and 7th October - secret services in any country are sometimes clueless.
You'd think that they'd be a little more in-tune to this sort of thing given the fact that Russia is a far more controlled society than the US or UK, and that they're at war with a country on their borders.
Oh well. Nothing that vodka and a window can't solve.
"Display" being the operative word. Good for PR, and maybe good for NATO in some small way in the future, but it won't change the war or how many Ukrainians are getting killed. A lot of the Ukrainian "wins" in this war have been of that nature, which probably isn't surprising considering they're being planned by outsiders with other motives.