Can commercial software-defined radio communications replace JTRS? One reader points out why not

I wrote a story earlier this month, Air Force plan to cut its JTRS military radio program may acknowledge developments in private industry, in which I suggest that commercial developments in software defined radio (SDR) technology may be surpassing the U.S. military's Joint Tactical Radio System (JTRS), and that commercial SDR might eventually render the military's JTRS developments obsolete.