The "B-2" in B-2 Spirit is not shorthand for "Budget Buster," but the original stealth bomber is indeed the most expensive airplane ever built. Just how expensive? $2.13 Billon per plane.
With just twenty operation B-2 stealth bombers, the United States Air Force certainly can't afford to have any sidelined, and losing another in a crash would be in a word: devastating.
A world without the B-2 Spirit likely wouldn't be all that different from the world of today – but arguably, the United States Air Force would have found its role in numerous conflicts.