For many years, the advantages of ultra-low water content, on-demand, high pressure industrial steam boilers have been touted. Features such as a reduced footprint, quick startup and on-demand responsive performance allowed multiple steam boilers to be successfully operated in a modular arrangement. Further, the modular approach proved capable of delivering improved performance over industrial watertube and firetube designs. In addition, the efficiency gains were accompanied by lower emissions.
Given all that, this next line might shock you: While the benefits are significant, the gains they represent are not enough to justify such a radical redesign of a technology that has changed very little in the last 100 years.