You can check the Commuter trains (S Bahn, Tram) in Swiss.
Unfortunately, I can't introduce you all cities in Swiss...
This video covers Zurich, Geneve, Basel, Bern, Lausanne.
And most of video was recorded in 2018 or 2019.
So I can't include trains debut in 2020...
But, I hope you enjoy my collection video :)
Thank you !!!