I find younger people, especially musicians and actors etc, who die young have not fulfilled their potential. A couple of examples are Amy Winehouse and Freddy Mercury. There are more, i know, but a singer, actor etc in their 80s and 90s dying makes me think "well they lived a good, full life" but someone like Amy Winehouse who was only in her late 20s, but was already a very talented musician, could have gone on to be a great, but she died and we never know.
Then you have someone like Marilyn Monroe who had a blossoming career, but died at a young age in her mid 30s. The list goes on. Chadwick Boseman was the face of Black Panther, he was Black Panther, but died in his early 40s just as Black Panther was at its peak.