Why should that be nonsense? The bubble topic is now very present and little is currently rosy. If you still buy now, it should simply fit quite well – in terms of equipment and price. Because an exit can possibly become very difficult "along the way" over the 40 years if you are not financially absolutely secure and very strong.
If prices can double in less than 5 years, and the annual increases are now getting bigger, they can also collapse very abruptly. The fact that the last ones get the short end of the stick is given – only whether they bought in 2021, 2022, or still 2023 is still open.
The idea that interest rates can never ever rise again is just an idea. If they, which is completely within the realm of possibility, reach a higher level again in 10-20 years, prices across the board will move significantly downwards accordingly. Additionally, demographic change will hit very hard in at most 10 years. On the labor market it already is. And houses are just places to live.
That’s what bothers me a bit. It feels like everyone assumes that the development will go on "forever" like this. But the problem with the story is that the air at the top end is getting thinner and the case of the OP is a textbook example. In fact, we have a widespread real wage loss in Germany. The GDL, as a very current example, currently has to fight hard for a 3.2% wage increase with a term of 28 months. That’s how employers operate. I’m curious what will come out of the next collective bargaining round with M&E and IG BCE, the big industrial unions. In my opinion, the last ones were no more than "adequate". Wages are thus at most stable; for most, real wage losses are likely the reality.
(Building) interest rates, another aspect, are still at an absolute low point. There is not much room left to go down. So there’s no room for further price increases there either.
The crazy prices like 855k here for a terraced house can
actually only still be afforded by ordinary employees if they earn far above average or if it’s gifted/inherited. Someone has to be able to pay/finance it in the end. The bank tells the OP everything is perfectly normal for Stuttgart? 2% repayment, three-quarter million debt capital, almost 10% equity, 42 years term, nearly 6.5k household income, where even all special payments are already included? Earlier, banks would have asked you if yesterday’s pub visit maybe lasted a bit too long for such a project. Today they probably act more out of self-protection to secure their money from negative interest rates.
Again, in my opinion, this cannot and will not go on forever, except of course if 1% repayment becomes the new standard and then the great-great-grandchildren still have to pay off the house. Good luck with wealth building...