He did not die as Yoda, and ObiWan did. He just disappeared, and the whole lights flashing across the sky is new.Maybe... his clothes did fall down like Yoda and Obiwan Kenobi's did, though...
In The Last Jedi, when Yoda appears to Luke and they are sitting on the ground commiserating, Yoda is not transparent like the ghosts of previous appearances. He is opaque, and he wraps on Luke's head with his walking stick which is obviously quite solid. Neither of them are surprised about Yoda's physicality. They both understand at that point something the viewer is unfamiliar with, is familiar to both of them.
Luke repented of his desire to torch the Jedi texts, and then went to go save them when Yoda torched them instead. At the end of the story, when all the survivors are on the Falcon, Flynn opens a drawer to get a blanket for Rose, and in that drawer are the Jedi texts, somehow magically transported across the galaxy.
The dice that Luke took from the Falcon and gave to Leia, are physical objects that last after he leaves, but do not last permanently. They later disappear. We are meant to wonder why they disappear, and how a physical object could have been transported across the galaxy--just like the Jedi texts, and just like Luke.
FYI, according to official SW lore, Luke is the purest and most powerful Jedi of all time. There is no way that Kennedy would have changed this. What she did was scare the shit out of millions of viewers that the Jedi Order really is going to end, and she did it so well that everyone hates her guts. But beware. Luke is not dead, and the Jedi are not done with. It's all act 2 ruse and fright, necessary to any good trilogy. What it really is, is some of the best writing to come out of Hollywood in decades.
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