Excellent catch ) And the best line in Gdansk.

How many 3-car trains operate these days? Thanks.

Thanks so much Yury!)
Anyway, in fact every second ride (it means every 20 minutes) is serviced by Konstal - there is only one exception where is 2-3 low floor schedules in a row.
To summarise, there is (could be) 7 high floor trains. During my stay in Gdansk, there were four 3-car trains in service - the rest of it were 2-car. Actually I have taken 5 3-car train. Every day, one of them was not in service. So do not hesitate and when coronavirus allow it, arrive immediately!)