I lived in an apartment in Frankfurt that still had this. The bathtub/shower was in the kitchen with just a curtain separating it (toilet with sink was in a separate room). With two roommates in the apartment, it made for some awkward moments, but you get used to it.

Now in my mind I started debating merits of wetroom kitchens... The remembered that you have lot of cabinets and dry goods inside... So benefits of being able to hose it down might be questionable.

I never heard of that, interesting. You'd think it would rather be a schwäbisches bath.