A few of them did, but certainly not the majority.
Atlanta’s streetcar system got entirely torn out, paved over and converted to buses. We didn’t get a subway system (on entirely different right-of-way, and much less of it) until decades later.
Similar with Montreal. A whole grid of streetcar lines just got torn up and replaced with buses. We now have a nice metro now at least, but it certainly wasn’t made from pre-existing tramways.
A few of them did, but certainly not the majority.
Atlanta’s streetcar system got entirely torn out, paved over and converted to buses. We didn’t get a subway system (on entirely different right-of-way, and much less of it) until decades later.
Similar with Montreal. A whole grid of streetcar lines just got torn up and replaced with buses. We now have a nice metro now at least, but it certainly wasn’t made from pre-existing tramways.