I saw tremendous amounts of money wasted by San Diego in their light rail/trolly system. It is lightly used for commerce commuting, but only carries significant volume when taking people to football games (stadium also owned by the city). Football team left, and now the trolley has turned into folly. Almost no one uses them to commute to work. They even do not go to the airports where they at least would be usefull for taking tourists and business travelers into the city.
Electric busses are far more adaptable and efficient than light rail. They don't require tearing up roads to install rail and the same roads can be used by cars/trucks and busses.
The real advance is when cities will ban ICE vehicles from their city centers, and turn major shopping streets into pedestrian malls. The quality of life for citizens goes up dramatically, as those places become areas for people to safely mingle, enjoy concerts and a coffee in the parks.
Light rail is horrible. Take a ride on the BART is SanFrancisco to see how it transports bums around the city. Super uncomfortable for commuters to endure the filth just outside (and often inside) the stations. Need to trip over the bums (homeless if you prefer) step around there feces and be careful to not step on their mass of discarded hypodermic needles. Those light rail cars are loud as hell. They screech and lurch around ever curve.
Please, if you think light rail is something you might like, just take a ride on any of them in the US. Most are horrible. Our US Senate has their own personal light rail system for use going to the capitol, but it is not available for any private citizens to use. We are blocked form using the very system we paid for in our taxes...Elite indeed.
The unions funnel tremendous amounts of $ to get elected official elected. Those same officials then foist all these tremendously expensive light rail systems on their citizens...all with equally tremendous amounts of borrowed money. Those loans are then secured by laws passed to force the same citizens to pay twice for the constructions with their ever increasing taxes.
I remember when Seattle was one of the most beautiful and welcoming places to live. A paradise lost by overbearing governments.
Keep Seattle weird...but not bankrupt.
Tesla has a better idea with clean and quiet automatous vehicles, delivering people inexpensively from place to place in peace and safety. They will be available as a hailing system.
Much better for your politicians to spend your money on Boring company tunnels and Hyperloop transportation with electric automatic cars for last miles transport. Cleaner, cheaper and much more pleasant.