A lot of cities have or had rent control, usually with disastrous results. What makes Montreal different (non-rhetorical question)?
However, I live here, and it's incredible. Every time some economist (or, worse, economics enthusiast) makes a ludicrous claim like "rent control is objectively and universally agreed upon to be bad" I just laugh. Montreal routinely ranks as one of the best cities in the planet (and I agree with that assessment), so clearly it's not as black-and-white as it's made seem.