Only 50% of the USAF bomber force of B-52s, B-1s, and B-2s are operational at any given time which is not only sad, but dangerous to national security. Of the mere 20 B-2s only 9 are ready to go at any given time. While the future looks like UCAVs and even aerial carriers with them, the Northrop B-3 is in the works. No longer stealth prioritized, it is designed for long range and heavy carry of bombs, missiles, and possibly possessing defensive or offensive laser tech (HELs). A blended body design, it is projected for 2030 which is a long time away. Russia has the Sukhoi PAKDA and a rival Tupolev design in the works for an earlier IOC despite sanctions. China is also building a stealth bomber of independent design.

Note: MOAB is roughly 11 tons. In WW2, Germany tried a 17.7 ton bomb dropped by a Me-323 which broke apart after the drop. The Russian "Father of All Bombs" thermobaric weapon is an incredible 44 tons. It is doubtful that the Tu-160 could carry it but the Russian giant Antonov transports can with ease.