How do you envision downtown Boston thirty years from now? This was the central question addressed at a recent workshop hosted by the Boston Planning & Development Agency (BPDA). Dozens of city planners and representatives from Boston’s residential, commercial, and nonprofit communities gathered at Suffolk University on January 30 to discuss options for future development downtown generated by the BPDA’s PLAN: Downtown study, now in its second year. The different scenarios could have far-reaching impacts on the future of preservation in Boston.