Providing people with options on how/when they leave this world and making suicide less taboo. You could say most technically have this option already but I think it's more humane if we provide reliable methods to do so via medical professionals. Leaving it up to individuals can be messy and violent.
On the cultural side, I guess I'd like to see less sanctioning of suicide so that we don't make people's lives more complicated for merely expressing their desire to do so (e.g. getting the police called and being held for days)
All of that to say that death is sad regardless of what time you leave and I'm not advocating for people to do it. Just that we should have the option like any other healthcare service with guardrails of course.