Cutting off financial help might result in them feeling stuck with their past choices, resulting in depression etc - I wouldn’t do that. Many successful entrepreneurs come from supportive households.
Where I live, a person has full discretion on who inherits their estate if they explicitly write their will. Your offspring and next of kin are the default inheritors, but can be excluded if you explicitly say so in your will.
https://www.globalpropertyguide.com/Europe/Austria/Inheritan...
So I wasn’t right about the fixed part, it very much depends on whether there is a spouse to inherit it to.
When my kids turn 18, we'll fight to the death in the backyard. If they win, they get my stuff. If they lose, I'll have some more & repeat the process. Don't think I'll be around long enough for a third go.
I feel like my default is no children, and that will only change if and only if I reach a level of wealth that I can feel very comfortable committing to the ~18 years of directly raising a new human, the 4+ years thereafter for continuing education, and all the costs associated with raising a well experienced and skilled human so they can have a chance at generating their own wealth.
However, I also think inheritance is mostly a curse on people who receive it, so if I had children, I would raise them with the explicit expectation that I will pay for their education, but will likely have a hard cutoff of financial help after a certain milestone or age. And they can expect 0 inheritance.