Toronto’s architecturally innovative and acoustically controversial Roy Thompson Hall turns 25 this year. “With the passage of years the hall’s deficiencies came to be seen – or, rather, heard – in marked contrast with pre-construction press releases promising Torontonians not just a fine hall but, rashly, the finest concert hall in the world.” A $20 million renovation helped, but debates continue to be heard over the hall, its quality, and its evolving mission.