Yes, everything you said plus I recall what downtown looked like...a run-down, sooty area filled with a lot of unkempt buildings. Scollay Sq. was a mess (recall the Combat Zone, only seedier). Many buildings had only ground-floor occupancy (look at the Ladder Streets today). What used to be Haymarket Sq (located under the GC garage overhang) was a traffic nightmare. The concepts of adaptive reuse, of appreciation and preservation of architectural styles from the past, and an recognition of the need for small apartments led to the much of the destruction. The only buildings worthy of preservation were very old historic sites preserved for posterity and the Freedom Trail. Even then Old State House was nearly destroyed by later additions and not appreciated till it was nearly torn down. Let's not forget the appalling condition of the South End (considered "slums") at this time and of much of the Back Bay, peppered with with rooming houses and degraded properties. Many apartments in the North End still had no private toilets or showers (my uncle didn't get his till well into the 70's for his 4 room flat). The public areas of tenements were smelly firetraps and caked with 20 layers of paint. And the subway system and multiple elevated track systems may have been only 10 cents a ride, but were a dismal and grimy experience. It's no wonder that drastic measures seemed to be the only option and "dispensable" neighborhoods filled with poorer immigrants became primary targets (the West End). The only chic neighborhood downtown was the south side of Beacon Hill, Charles St., and the "flats". Boston was desperate for investment and the New York World's Fair style of "moderne" public "architecture" became the paradigm (witness the globe street lights formerly on Cambridge St. and elsewhere, the entire original Pru scheme, and the use of space in GC.) And admittedly, at the time we thought all the new stuff was the ultimate in renewal. It was such an improvement over the dumpiness still extant in Faneuil Hall and Quincy Market, overrun with rats and commercial trucking.