I made a spreadsheet documenting every single named death in the entire game.

[Cleretic]

That's some really cool data! Years ago I did a similar experiment, but didn't just do named deaths. I counted the corpses. It was something like 44 in base ARR alone.

Yeah, the reason I didn't do that is because as the story goes on it gets more and more difficult and more and more nebulous in criteria.

Just eyeballing it, I'd say that the Ghimlyt Dark is the point where it becomes unfeasible, and Endwalker is the point where it becomes outright impossible between Garlemald, Amaurot and the Dead Ends. While I think named deaths are a useful and important metric to track for storytelling reasons, one of the big reasons I picked that metric is for pure viability; names are always countable in a way that corpses aren't.