Havrik Stoneskimmer
Adventurer
The unique thing about astral elves is that they could swap out a skill proficiency, in addition to a weapon or tool proficiency. In Monsters of the Multiverse, eladrin, sea elves, and shadar-kai can all swap out two weapon or tool proficiencies. Jeremy Crawford said it's because most elves are tapping into a shared elven memory bank, but astral elves are connecting to an even wider set of experiences via the astral plane (which is why githyanki also have this ability). So I was absolutely sure that the PHB elves would get the two weapon or tool proficiencies in the revised version.The Trance that let Astral Elves swap things was suggested as something unique to them.