Well, my parents have a nuclear shelter in their cellar... It's going to get a bit cramped since the family has grown by 2... Not that I'm expecting any use of nukes. Unless Russia is invaded directly, nukes are off the table, and I don't think anybody's planning for that.
What about if NATO territory is invaded directly? This is something I hadn't considered when thinking about such conflicts earlier in life: The nuclear-armed NATO states are in a bit of a bind if Russia should make a penetration into Europe that can't be contained by conventional forces: either surrender everything east of France to a new Warsaw Pact, or bust out the nukes and give Russia the propaganda coup of NATO having made a first strike.
You could argue that that won't happen, because NATO has better this, that, or the other, but the Allies weren't planning on France being overrun in WWII either. On top of that, European states have largely underfunded their militaries on the theory that the US will come to their aid in any crisis, but the prospect of US troops on Russia's borders is largely what has brought about this crisis, or at least what Putin is using as an excuse, so the US can't deploy too many troops to Europe before Putin actually attacks NATO without either setting off Putin's paranoia, or giving him the excuse to act like his paranoia has been set off (not to mention that even aside from that, a domestic constitutional crisis, or a Chinese invasion of Taiwan, could leave the US unable to attend to Europe). And changing the balance of military funding between NATO members takes years, whereas I could imagine the current crisis developing into a general strike westward, if Putin is so inclined, within weeks to months, maybe even days, of an invasion of Ukraine.
I do think the more likely course is that Putin will invade Ukraine, and the West will sanction Russia, and once Ukraine is overrun things will calm down for a while, but if he has success in Ukraine, Putin will almost certainly, whether in a week or in five years, start building up forces on the Polish border, and make the same demands he's making now about NATO returning to its Cold War membership. And then we get to decide whether to throw Eastern Europe under the bus again or risk direct confrontation with Russia.
When it comes down to it, Ukraine is Czechoslovakia, Crimea and Donbass are the Sudetenland, and Minsk is Munich. Fall Grün is now ready to be set in motion, and it's now probably too late to save Ukraine, and it's hard to imagine any course of events going forward that will do anything but embolden Putin. And here's the terrifying bit: the only thing that curbed Hitler's aggression was Soviet troops outside the Führerbunker: he was self-destructively belligerent to the last. If we need boots on the ground in the Kremlin to discourage Putin, things
will get nasty.