I hate wading into the bomber free-for-all again, but the initial point (valid or not, its a statistic and we all know about those) was a comparison of various platforms in an attempt to get a cost per DPI. Several people have discussed range and loiter time. If you want to make this comparison (still not claiming it holds great value) you need to hold some of the variables constant to get a good comparison. Therefor, you either need to compare fuel burn and targets on a short range sortie (Nellis range from Nellis?) or compare fuel burn and targets on a long range sortie (F-16s flying from Diego Garcia?)
Second, you throw out that B-1s aren't nuke capable. They were, but the US Government traded that capability away as part of the START treaty. If we really had to, I'm sure the B-1 could go back, but I hope they don't.
Does the B-1 work with JASSM? Yes, I ran OT&E. We train to that capability. I'm sure you also know that MALD is initially planned to go to the B-52 and F-16 (Objective platforms) and will eventually migrate to others - B-1 included.
As to the initial statement that the B-1 may go away soon, I highly doubt that given its current role in the CENTCOM AOR.
We now return you to a debate about lies, damnable lies and statistics.