They are investing in their Public Transport Network like no one else (Grand Paris Express). I'm quite jealous in Germany with our investment brake morons in politics.
Here a short video mentioning the investments and upgrades they are undertaking right now,
https://m.youtube.com/watch?v=ot5vp6FZ_Bg&pp=ygUUSURGIG1vYmlsaXRlcyByZXNlYXU%3D
And here you can see how much a new tram line construction is also upgrading the environment surrounding it, and making it more liveable (they're also adding cycle lanes and making the spaces more pedestrian friendly)
Compare that to big cities in Germany where a bit/nothing is really happening. Especially not with our new dumb conservative government
No. My Travelcard loaded on the Navigo Easy card worked on all my Paris Visits on Bus/Tram/Metro/RER