SF's central subway

Howard Wong, a fellow member of SPUR's project review committee, sent me an email today about the proposed central subway, which would run up 4th Street, linking the CalTrain Station at King Street in Mission Bay with Market Street, Chinatown, and North Beach. He included a handout quoting Allan Jacobs (emeritus urban design professor at U.C. Berkeley and former SF planning director) warning that new stations in the latter two areas would spur redevelopment that would change them beyond recognition. I haven't studied the issue, but it looks like another reason to do a new plan now for SF's urban core and the districts that adjoin it.