> First, you can’t go faster than cars or avoid traffic (in practice),
that is not true, in cities the car speed is usually limited to 50, a lot of trams go 70 on certain sections. Also "or avoid traffic" a lot of trams go completely separetely from the traffic.
> because modern suspension beats aging fixed rail (it tends to be shaky, again unlike trains).
Depends on the city, but a lot of cities that I visited have a very modern trams that are not shaky (helsinky, zurich, bratislava, riga, edinburgh, bordeaux...). Also the technology of the rail building has changed and the new lines are meant to be quiter and more stable
> Trams are electric? Given how buses are basically commodity in our oil-centric world, I can only imagine how trams look at the balance sheet in comparison
No idea what you mean by this but I would assume that the cost of running things is lower, the c02 profile is for sure https://ourworldindata.org/travel-carbon-footprint