What is canon?

[Leftovers]

I'd say there wasn't even a need to bother with timelines until it became untenable to reconcile all of Nasu's works in a shared framework of rules. The core three operated under the same logic of a setting that could accommodate for all their constituent elements; small corrections of that time had to do with potential logical conflicts. When you drop something like Extra on that setting, it doesn't insert neatly into the existing framework; hence, alternate timeline, and a fundamental restructuring of setting.

[Bookworm Luke]

I mean in the sense that Roa's story is one of harsh decline as time goes on, both in universe and out of it.

Nasu wants to you move on from Tsukihime heroes and villains, and get ready for Tsukihime 2 power levels.

[Ratman]

He can still kill NAC in a single combo. He still got it.

[Takashi]

The one author personally believes in it's story and the ones that aren't gag

[CO9p5JMGv!p9]

Spoiler:

obviously this image is the official stance

[Benderesco]

I voted that there is no canon because it allows me to pretend FGO does not exist with a modicum of objectivity. If canon is relative, my headcanon is at least as valid as anyone else's.

And that makes me happy, I suppose.