I guess few remember when a choice was made way back when the Desert Wind was axed instead of the SWC. I remember it was a very close call.
I'm far to young to remember that, but I can easily think of a few good reasons that the Desert Wind could be preferred over the Southwest Chief. Las Vegas was a much bigger loss than Albuquerque. Denver and Salt Lake City would also provide more traffic than Kansas City to/from the west, while if I remember correctly Kansas City had direct corridor service to Chicago via St. Louis at the time. Because the route ran fewer miles as a stand-alone train, it would likely also be cheaper to operate. However, it took about 8 hours longer than the Southwest Chief. It is a similar situation to the Florida trains, with the SM being a popular express train serving no major cities between Washington and Jacksonville, while bypassing Florida's second largest metro area. The SS is more lightly used and takes longer, but it serves Raleigh and Tampa. I would support preserving it over the SM, as many SM passengers would switch to the SS if it were the only option, as most popular city pairs are still served, even if it is a little slower. Meanwhile, many of the popular city pairs on the SS are not served by the SM, so those passengers would be lost if the SS was lost.
While I would be disappointed by the loss of the SWC, if it resulted in the gain of the Desert Wind that would be essentially net neutral in my opinion. However, having no direct route between the second and third (and indirectly the first) largest cities as well as the largest Amtrak corridor hubs would be terrible. The TE would still exist, but that is only tri-weekly and takes almost a full day longer. There are so many complaints about losing the LSL NYP branch, which is just a cross-platform transfer and takes slightly longer. I can't imagine what it would be like on this forum if the LSL and CL were to disappear so the only CHI-NYP option was the Cardinal, which would essentially be what is happening to the Southwest-Midwest/Northeast market if the SWC was cut up.