> My parents had a hard time adapting after I, as the youngest, also moved out and finally started being able to support myself, even though they had grandchildren from my eldest sibling to think about.

"Thinking about" probably won't do them much good. Seeing them on a regular basis, on the other hand, has great effects on many grandparents. Obviously, this requires that children don't move far away from parents, but many family-oriented parents stay close.