According to [1], the cost of one train from this manufacturer is over 10 Million Euros. Why would they play these shenanigans in a competitive market at the risk of pissing off their customers? Are other train vendors doing the same?
Or is this a local lock-in where it is hard as a Polish railway not to buy from the one Polish manufacturer?
[1] https://rollingstockworld.com/passenger-cars/latest-procurem...