What makes for a more pleasant experience is not necessarily the optimal choice for commuters as subway wins over trams by close to an order of magnitude in terms of throughput.
In the city I grew up in during rush hour subway trains leave less than every two and a half minutes and pack well over a thousand commuters each. That is an impossible feat for even the best tram system, as they're limited both in vehicle and station length, not to mention speed, as you can't have 40 tonnes of metal hurtling at 80km/h through intersections.
In the city I grew up in during rush hour subway trains leave less than every two and a half minutes and pack well over a thousand commuters each. That is an impossible feat for even the best tram system, as they're limited both in vehicle and station length, not to mention speed, as you can't have 40 tonnes of metal hurtling at 80km/h through intersections.