Tiled shower floor - sooner or later trouble due to silicone joint?

But then it would be tight to open the window. ;)

True. I don’t think about such things because we have fresh air, at least in the bathroom, through controlled residential ventilation. I would subordinate window cleaning to aesthetics and storage.

A pentagonal shower 1 * 1 m where the toilet is would have looked good next to the bathtub, and the toilet then where the shower is.

Would have, would have... I would have done many things differently too, but I wasn’t asked ;)

What is the danger with the current version?

Finding a suitable door. Custom-made doors are expensive.

Where the toilet is was previously the shower. We specifically relocated the shower because otherwise it would be much too tight with the sink and shower. We wanted to create a more spacious area here. Otherwise, there would have been a distance of 60-70 cm between the sink and the shower. But thanks for the input. If we had built it, a lot would have been different. A suitable folding door costs about 400-500€ made of glass.

I would classify window cleaning under aesthetics and storage.

The window cleaner can do that standing in the tub. :p

They could only have made it thicker... since it is a rise shaft for the other apartments, but then it would be even wider. What is the danger with the current version? Obviously not the coolest looking, but it serves as a shelf and area for the shower door. Maybe one more joint...

Wider would be good! Then you could put shelves or inserts in there, some decoration and sparkle sparkle, indirect lighting, hooks for towels and bathrobes, etc... There are 100 possibilities.

In the end, it doesn't matter anyway, because only you notice it. Over decades..

:p :p