original news story discussion just over a week ago: https://news.ycombinator.com/item?id=38530885
And the followup from the company
Polish train maker denies claims its software bricked competitor rolling stock https://news.ycombinator.com/item?id=38570654
More late quality from 404
Polish train maker denies claims its software bricked competitor rolling stock - https://news.ycombinator.com/item?id=38570654 - Dec 2023 (2 comments)
Dieselgate, but for trains – some heavyweight hardware hacking - https://news.ycombinator.com/item?id=38567687 - Dec 2023 (289 comments)
Polish trains lock up when serviced in third-party workshops - https://news.ycombinator.com/item?id=38530885 - Dec 2023 (357 comments)
I think there may have been others?