Yeah the problem is rent is much to cheap compared to other European capitals.

In the context of Berlin 10 years ago perhaps, not when compared to other world capitals.

Healthcare and social safety nets would be my reason. Even people who thought they had adequate healthcare can go bankrupt, and every time I see a Reddit post about one doctor being "out of network" leading to a large bill I'm glad that sort of thing doesn't have to occupy any of my mental space at all. I had a hard enough time picking car insurance.

The social safety nets is not so much for myself, but being surrounded by others who are struggling is unpleasant but also leads to societal issues overall (crime hotspots, etc).

I long ago decided that settling in the USA would be great if I ever magically become rich, but until then since I have no roots in the area it's nice to visit but I'm not sure I'd stay. One definite benefit though is that the states vary a lot in culture and feel so you can probably find an area that suits you.