Just as obtaining GE makes travel a whole lot easier, and the PE level even further facilitates the journey, SWUs will make it easier and far more likely that one will continue to achieve the 100k mark each year.
Many of us do make MRs to reach our thresholds. Regardless of the ease of use or various restrictions, the SWU can only help reach the holy 100K each and every year. And who wants to be be sub-100K in a potential merger environment?