I have never thought about that and would find this development unfortunate. I hope, please don’t take it the wrong way, that you are wrong. ;-)
What actually always surprises me are the kitchen and outdoor facility prices mentioned here. My husband and I will stay well below that... and I still think there is nothing against a used kitchen. What I also find interesting is that almost all pictures show "always new furniture (?)". We will move with our old furniture. Oh, a topic for maybe a new thread. :)
When I built, the forum was still much less exaggerated in that regard than it is now. Even back then, it was said that it was hardly doable at that price.
But with a bit of discipline, we could have stuck to our budget. We were pretty much on track until almost the end.
In the end, due to construction delays, we still had so much equity left that we didn’t have to watch the price of the tiles so closely anymore. That was the amount that then exceeded the budget.
If I had checked prices in the forum beforehand now, we probably would never have built.
We also took most of the furniture with us; it was and is being replaced one by one over time. We also took our kitchen with us. I modified it a bit and installed a new countertop on it.
Back then, we went into the calculation with about €3500 net income per month. That was already tight.
That it turned out completely different at the end and that we will probably have paid off our house within 12 years, no one could have guessed.