No, Szczecin isn’t day trip territory from Berlin.
I’d do it as a leisurely Interrail trip changing at Rzepin. Pasewalk is another possibility if the line to Szczecin is open.
This time last year there were still KT4Ds in Frankfurt Oder.
I’ve decided to tag two nights in Szczecin on to my Berlin trip. A day trip there would be pointless.
It seems the best ways to Szczecin by train will be either via Pasewalk or Kostrzyn. I’ll probably do both as I’ll be going there and back from Berlin.
I was Konstals still running in Wroclaw while my train went through.
Poznan has a good number of Moderus Betas - this century's product albeit based on the Konstal 105Na, so not in any danger of disappearing and not exactly historic. Despite being a 'modern' product the Beta doesn't ride well at all.
TBH the best Tatra environment I find is still Prague. The rolling stock and trackwork are maintained / modernised to a higher standard than any other former Eastern Block networks still operating Tatras I've sampled. 2.5m wide bodies of the T3 are just that much more pleasant to travel in than the 2.2m KT4s, and KT4s vibrate once they get to speed. Riga still has a lot of unmodernised track with vehicles going very slowly over curves. I found rides in Szczecin and Poznan a bit bouncy. A ride on a T3 in Prague is so smooth and pleasant, and (only done one evening and morning mind you) not a single wheel flat (had them in just about every other city).
Indeed Prague is Tatra Heaven. Sadly I have no plans to revisit anytime soon, but hopefully I will next year if I get the chance.
With the better track condition, trams get up to decent speeds, which can’t always be said for other cities.
To update my post, Görlitz is guaranteed Tatras at the moment, as that’s the only tram type they have! There must be very few tram systems left where the trams are guaranteed to be old non-low floor stock - I wasn’t expecting it to be a system in Germany. Though this will change relatively soon as new trams are on order.
Sadly I won’t get a chance to visit Görlitz on my next trip, as like Szczecin it’s too far for a day trip from Berlin. I’m slightly kicking myself as Görlitz is really beautiful, and has the quirk of being right in the border of Poland like Frankfurt (Oder). Szczecin doesn’t look as interesting, though it does have ex-Berlin Tatras operating and a transport museum.