It does worry me if I were to die. I have some chronic health issues which means making old bones is highly unlikely for me. The boys have no peer aged friends here at all and as one is very autistic I don't know what would happen to him. I expect their siblings would step up if I was actually dead but while am alive they expect me to be here for them. My dd said she'd consider taking the autistic one in 20 years or so!
So it could be doable but am preparing myself for the chance it might not.