As crazy as it sounds, we may very well be looking at WWIII,and people will worry about selling their amps,or hoarding tubes.
So it's nuts to be buying extra tubes for a tube amp...when your hobby is hi-fi.
But instead we should be acting like...what?...the world won't be here tomorrow?
Not sure of the point you are making by conjoining those two issues.
If the nuclear holocaust happens all is lost, it's not like we can prepare for it. The more sane thing is to keep living life.