>or just allow more people to travel.

Which is an increase in quality of life for those who would have otherwise forgone those trips. Either way it's a win.

Whether it's a big enough win to be worth the cost is a perpetual debate with projects like this.

The biggest win -if it works as expected- would be the influence on other cities to do similar projects and focus on creating fast-and-electric-powered alternatives to move cars; also there may be a gain in safety issues due not relying in the driving skills of its users.

An increase in quality of life? Really? Who is to tell? Maybe those people would have done something more fulfilling instead of whatever they did as the porpose of those trips.

"Who is to tell?"

Generally the person themselves should be the one to tell. Other systems have not worked out so well.