That depends on if you think being infused with one type of magic or another changes your race. And it’s a murky discussion to be sure.
Blood Elves eye color changed to green when they started powering Silvermoon with fel crystals (and in some cases we saw Blood Elves siphoing fel energy from them directly - Blizzard really needs to update Silvermoon because I am sure those fel crystals are gone by now). They weren’t “infused” like the Fel Blood Elves were though so they didn’t experience the same level of physical change as the Fel Blood.
Demon Hunters are infused with fel and a demon’s soul, to the point where they develop demonic features such as wings, claws, and scales. Are Blood Elf and Night Elf Demon Hunters still Blood Elves or Night Elves just because the game mechanics presents them under their respective race categories?
Everyone likes to say Paladins are infused with the Light… but are they a different race because of that? is a Human or Blood Elf Paladin any less of a Human or Blood Elf because of the Light flowing through them… even if it changes them in some way like say… making their eyes glow yellow?
Then we have Lightforged Draenei and Highmountain Tauren. Is Paladin Light infusion somehow different from Lightforged Light infusion? Did the blessing that gives Highmountain their different antlers change their race? In truth I think many would agree that Lightforged and Highmountain could have been customization options under their parent races rather than allied races.
Playable Kul Tirans look very different from playable Humans originating from Stormwind, but they are still Human, despite fan fiction that they crossbred with Drust and that’s why they look the way they do. The devs are on record stating this is not the case.
The Nightborne remained under a dome for 10,000 years and relied on the Nightwell to sustain them. They clearly have physical changes, and the culture is an evolution of the original Kal’dorei culture, not the more nature based of the Night Elves of today, yet both Tyrande and Alyssra were around 10,000 years ago and have a shared heritage.
The Void Elves as a “race” are very new, being barely a few years old at the end of BfA, and possibly several more after the timeskip between Shadowlands and Dragonflight. The ones caught in Durzaan’s trap were clearly affected by it physically, but the devs have left the Ren’dorei in limbo regarding how new recruits are coming into their power.
The answer I find most likely, but still needs dev confirmation, is that the new recruits are studying the void via a path similar (but not necessarily identical - so don’t jump down my throat about a lack of Dark Naaru) to Alleria’s since that seems far safer and reliable. If that ends up being the case, that would explain Void Elves retaining their typical High Elf skin and hair colors.
I don’t believe that Umbric would subject anyone to the experience he and his squad endured in Durzaan’s trap, and trying to recreate that ritual which was prematurely interrupted and never intended to create the Void Elves Umbric and his squad became, and modify so it does so safely and reliably, seems implausible and incredibly foolish when you have a relatively safe and proven method (Alleria’s) already at hand along with Alleria’s teach Locus Walker.
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Blizzard categorizes Alleria’s race as Void Elf now, but she clearly looks the same as a typical High Elf when not in void form.
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The player Void Elves looked different when first introduced, as they seem to have been intended to be part of Umbric’s initial squad that got zapped in Duzaan’s trap.
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The presence of Silvermoon Scholars and High Elf Wayfarers implies that new Void Elf recruits may be coming from these visitors. A player Void Elf could originate from one of these recruits if that’s the case.
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The High Elf customization options now allow player Void Elves to appear as typical High Elves when Entropic Embrace isn’t active, just like Alleria, albeit with a different selection of hairstyles than Blood Elves have.
What we need is for Blizzard to answer the question of how do new recruits come into their powers. Is it some variant of the Alleria method? Is it some variant of the Durzaan ritual? Or is it something else entirely? And even then… how Blizzard treats the word “race” in game mechanics and game lore still leaves us without a clear answer of are they actually a different race.
It makes me think of the X-Men. They are mutants… but are they any less human because of their mutation? Are they just human plus? Are they a new breed or ethnicity or human? Or are they altogether something not human?