1 life ruined (mother), 3 people would experience serious grief, my father, the only close friend I ever had and a friend with BPD who has strong issues with abandoment.
A handful of people might feel a little sad/shocked for a bit, that's roughly the extent of it. I do genuinely believe most of my "friends" would get over it rather easily as our relationships are rather distant and unattached. I am not important in any of their lives.
Never in my life have people really sought me out or cared what's going on with me or wanted to do anything with me for the most part, I am boring, I am awkward and unremarkable. The only person I would feel terrible about hurting this way is my mother, despite hating her for her past abuse she's sacrificed too much for me, comes with living in poverty and raising two children alone.
Most of my family couldn't give less of a shit about me, not my grandparents, not my uncles/aunt, I grew up all alone without a single adult giving me any time of the day or attention and so I couldn't give less of a shit what they feel about my death. Grief for the person they never knew or cared to know?
My grandfather passed away this year, I saw him about 3 times in the past 15 years. My grandmother passed away a few years back, she visited us once for about 3 days when I was 9 and spent most of her life abroad and I was always too poor to conceivably visit her. The rest of my family is no different. Dad left when I was 7, lived nearby but I only saw him when I went there until he moved further away and we see each other 1 or 2 times a year. My uncles and aunt had money and means but never once visited me.
So honestly? Fuck em. Once I became an adult I had no desire to pursue relationships with the people who never gave a shit or made any effort to know me, fuck the idea that family is so sacred and important, I owe nothing in death to someone who was never there in life.