A Gift of Mortality?

[Mahal]

Elves, can also not move forward, in a sense, that they can't really create new things. E.g. the swanboats, of the elves, who were destroyed. They said the could never create something like that again(this is all imo).

Unlike Men, Dwarves, and Hobbits, they do not die and leave the boundaries of the Earth

Don't Dwarves get gathered, in the halls of Mandos to, by Aulë?

If anything sounds vague, it is because I need to read all the books again(im forgetting things like names and such ).