I got recommended another channel about Stockholm by Youtube.
These two videos are great.
In the first one you can see a 13 square meter large apartament (without a kitchen) which costs €200 000.
From the second one I found out that the last ones of these retro looking underground trains which had been trafficking the red line, C14, were taken out of cervice on February the 10th 2024, almost a year ago, so that's why you can't see them in the underground any longer.
Click to view
Click to view