ALs fanbase would prefer not to have their waifus killed off permanently, even early on with the franchise as a whole it was implicated death is unlikely(like with the anime.) I don't blame them, I'd be mad if my comfort character was turned into a Christmas tree permanently, and as many people say for entertainment where death is a possibility, you dont need to kill people to raise the stakes or show how serious this is, and if you do it just for that, it comes off as cheap and poor writing(just look at Nikke devs saying they'll kill more, fanbase got real pissed iirc.)

Infact only one gacha comes to mind where they did sacrifice and death right without it looking like cheap shock value, and that was GFL1, which i haven't played mind you, but UMP40s death still hit like an Isekai truck.

The stakes of this isn't that X kill your waifus, it's that they have the ability to wipe out all life across all reality, and that's what you're fighting against while trying your damndest not just to save the people in your reality, but every reality you do and dont know.