You should make this a poll or you will only get those who have supported their parents to reply, if you were looking for percentages, that would be the best way to find the answer.
This crowd feels uncomfortable talking about being fortunate. While I haven’t had to deal with this issue yet because my parents are only in their sixties and comfortable financially, I can say that I did have it in the back of my mind when I bought my current house. Not for financial reasons but for potential medical reasons, I purposely made sure I had a spare room with a full bath on the ground floor, just in case, since I am likely to spend a decade or two here and it gives me the flexibility I might need since you can never be sure what will happen.