I also have a component that, assuming the continuation of the completed financing without any changes, is only paid off when I am 78 years old. I don’t think that’s a great idea and I also plan to work on moving the end date forward. At the very least, the installment should then take on a very manageable amount. The lady from the bank also said at the time that she had "no problem if a small amount remains at retirement."
Regarding support for children in their education, I am also in favor of a healthy balance. However, I do believe the "basics" (housing within a normal range, food, clothing, "pocket money") should be provided by the parents. For desires beyond that (own car, long-distance travel, horse...) the child should then please take care of it themselves and put in the effort for it. In general, of course, different fields of study also require different amounts of time for studying, and therefore also for working part-time, and that must naturally also be taken into account. The classic example is certainly medicine; that’s where it gets hard.
I myself worked almost the entire time during my studies and financed my hobby (own horse) from that. In addition, I found it important or rather my duty not to dawdle and usually finished within the standard period of study.
"At home" we have university and technical college, so plenty of opportunities regarding the choice of subjects. Nevertheless, I will not dictate the place of study to my daughters. Of course, it would be cheaper if they study here and still live at home. On the other hand, with my stepdaughter I saw that it is also very beneficial for the big princesses when they suddenly really have to take care of themselves because no one fills the fridge or puts the laundry clean back in the closet. Time will tell. For my eldest, it will be in seven years and then we will see. I plan for the possibility that I will also need to support her with a good amount of money then. Fortunately, the girls will not study at the same time, but one after the other, and they will also finish well before my retirement (woe betide if not!).