Too bad they can't bring back the classic streetcars. Ottawa was foolish to remove them...
They really weren't, under the circumstances.
Street trolleys were very unpopular at the time, which means no one rode them, and considering that they were publicly owned at the time, it meant the entire program was hemorrhaging money for the city. The track system was also very small, and the city needed to extend service to new post-war residential areas that didn't have track, so new track would have needed to be lay, but with the cars already unpopular, the city didn't like the idea for laying expensive new track for a system that was not used much. Also, the existing track was in terrible shape, and a huge chunk of it needed to be replaced.
On top of all of this, by the time they closed the project, literally all of the trolleys were desperately needed to be replaced due to age - they were falling apart.
Basically, the city had two options - replace every single trolley car AND expand the rail track line to 4x it's size AND replace half of the old track... or just replace the fleet with buses, which were insanely cheaper (bus companies at the time were pricing themselves at near cost in order to try and phase out rail in North American cities), and could service all of the expanding neighborhoods.
Expanding rail,
at the time, could have bankrupted the city. Buses were cheaper to buy, easier and cheaper to maintain, served a wider customer base, and were popular. It made absolute sense at the time to make the switch.
It sucks in retrospect, but it's clear as day as to why they made the switch.