I’m not sure how willing I am to call Luke’s “death” a “death”. It felt to me more like he leveled up.
Anyway, I mentioned this in the other thread, but I love, love, looooooooove that it turned out Yoda was so cavalier about blowing up the tree because he knew Rey had already stolen the texts. “There was nothing in that library that the girl Rey did not already possess” indeed.
Rey stated that Luke is dead, and Leia said yes before she nodded. He is dead.
However, what sort of FORCE Ghost he WILL become in EP 9 might be this FORCE projection we just witnessed. In that case, he will walk a fine line between alive/dead Luke. Maybe enough so to give us one last kick-ass lightsaber and/or FORCE moment.