JAC Motors, a Volkswagen-backed Chinese automaker, unveiled the first mass-produced EV with a sodium-ion battery through its new Yiwei brand. Although sodium-ion battery tech has a lower density than lithium-ion, its lower costs, simpler and more abundant supplies and superior cold-weather performance could help accelerate mass EV adoption.
Literally the first city I checked is switching gas powered buses to trolleys and new bus purchases are going down to 0 and Brno unlike many cities has an excellent public transport system
https://www.idnes.cz/brno/zpravy/dopravni-podnik-brno-financni-plan-uspory-zvysene-naklady-rozpocet.A221213_696580_brno-zpravy_azu
You checked one city at random and they were switching to trolleys? Amazing. Anyway, good for them. Let’s hope it will work and in a couples of years we’ll have some hard data to base policy on.
Not at random, I lived there for 9 years, so it’s a city close to my heart.