And the national train operators are being challenged on their own turf by open-access operators. The days of sleepers are probably numbered in this part of the Europe. Wagons with convertible benches are uncomfortable both for sitting and sleeping. They're utterly uncompetitive vis-a-vis reclinable seats deployed by operators like Leo Express. Perhaps one day they'll start putting lie-flat recliners used in airliners on trains one day. That's more economical--and flexible--than having separate rooms.
P.S. Polski Bus has been absorbed into Flixbus.