Quite some years ago there was some data backed evidence of this I would say. https://www.dkriesel.com/blog/2019/1229_video_und_folien_mei...

Here is the link to his talk directly https://youtu.be/0rb9CfOvojk?si=7EImZU9x4zFb6LSf

Its true that the network is quite dense and used by also cargo trains, but there is no denying that things got worse and worse. I constantly experience delay to do some stuff not working. I forgot even the minute threshold when a train is still punctual according to DB. I believe it's 10min by now, which can be deadly if you need to switch trains :)

Looks interesting. The 12GB minimum RAM requirements seem quite steep though. Why so much?

its a conservative estimate, but primarily because there's a socket server that runs alongside the main container, so you never have to manually save because changes are debounced, broadcasted to any other users on the canvas, and sent to the socket server which persists it to the DB