"The ever-rising investments seem to be only enough to keep the status quo of the crumbling infrastructure." It's quite a while since I've traveled by Deutsche

"The ever-rising investments seem to be only enough to keep the status quo of the crumbling infrastructure." It's quite a while since I've traveled by Deutsche Bahn but I found it very efficient and on time when I did. What do you reckon is the reason for the crumbling infrastructure? There was huge reinvestment after the war to renew war-damaged infrastructure and rail infrastructure usually has a very long life (many rail bridges and viaducts built in the mid 1800s are still in service today). Was that war reconstruction rushed/not well implemented or what?