DB Regio in Bayern is trialling its "Ideenzug" with passengers - it’s to test some smart new interiors for regional trains. More here 👇
https://railcolornews.com/2023/07/24/de-ideenzug-regio-double-deck-coach-now-in-regular-service/

But the picture in the article so completely sums up all that's wrong with rail in Bayern!

@jon semaphore mechanical style signal is not necessarily indicative of the signaling being ancient, that can be paired with modern line signaling
Bahnstrecke München–Simbach – Wikipedia

@jon but there's PZB? this would just be slow (which arguably matters a lot on a single track line, but) and more labor intensive
@pony @jon PZB was developed in the 1920s specifically to be able to retrofit existing signals without any additional requirements. The wayside equipment is literally just an inductor, a switch, and a bunch of wires.