>>63881043 (OP)It's a heck of a lot cheaper to purchase, maintain, and operate. Probably a fair bit harder to pick up on radar, as well, since it combines the B-2's low-RCS shaping with modern RAM. And it's designed to at a minimum carry one MOP, which means it has enough payload for just about any mission. Sure, it would've taken 14xB-21 to carry out this strike, but that's a lot easier to pull off when you have 100+ of the things, and having more of them available means you can be doing more things at the same time.