>>508948302
>Be German
>Obsessed with impractical wunderwaffen
Only one was ever built for a reason. A bomb with the yield of a few megatons will destroy pretty much any major city, nuking it extra hard with 100mt isn't going to make the people there more dead. With the same resources, you can make multiple weapons and adequately destroy multiple cities instead. If the bomber carrying your tsar bomba gets shot down, or it's shitty rockets blows up on the launch pad the materiel loss is far higher for you too. And let's say you do somehow manage to afford and field an entire arsenal of tsar bombas. If you use them, the best case scenario is you've just covered the whole planet with fallout. None of this makes any sense in the calculus of war. You can build one giant mega-tank that tanks harder than normal tanks and is super cool but gets stuck everywhere, or you can build 10 perfectly adequate tanks that actually have practical value.

>>508948855
I don't want to be that guy but even wikipedia says it was largely a publicity stunt.