I tend to play a more "just" V in my playthroughs and I think her giving up her 6 months of life for Johnny to have a full one is something that would really suit her. HOWEVER the fact that he just ghosts and hurts all her friends just ruins the ending for me. I also feel it does't really suit Johnny after his growth through the game. At the very least I feel like he'd tell them what happened out of the respect he has for V.(or at least tell V's partner for them to tell the others) Idk I get there r no happy endings in night city but for all V's friends and V it's still not a happy ending to lose her, just one where at least they get closure would be nice.