I always think about the scenario that I have outlived everyone I ever knew. Not sure if that is a good thing necessarily. I wonder how many new people you can meet or make friends after say 80 especially if you are not very healthy.
That said, I noticed diminished capability in life shortly before turning 40 and my mom is really struggling at 80.
Longevity does not seem like a good deal to me.
It also might work the other way round. Delaying aging might be exactly the same as prolonging healthspan. In that case, you basically have nothing natural to die of.
Some died, some simply moved away, or I moved away.
I wouldn't expect outliving my friends to be much different.