This discussion has some very interesting points from a manufacturer's
viewpoint, even though about buses it does reference trams.

https://www.abc.net.au/radionational/programs/breakfast/local-procurement-drives-melbourne-electric-bus-deal/13654782?fbclid=IwAR0Hx1FDHz3pcL3_KF7fbcRV-P5Fla6QN_q9q4N2RiIOF4l_7yfAhzJEuwQ

Tony P