As I said before, we have four different flavors of elves that each are unique in their own way.
-When Night Elves were playable in Vanilla, it didn’t stop Blood Elves from becoming playable, the latter of which were vastly different from Night Elves.
-When Legion happened, Nightborne were heavily requested despite having Night and Blood Elves, and sure enough we got them playable in BfA. While they share some themes with Blood and Night Elves, they still have their own unique characteristics and culture.
-Even Void Elves are very unique despite being Blood Elves and are interesting enough to stand on their own.
I get that Elves are one of the most popular fantasy races ever, but we also see multiple of other races as well.
-Bronzebeard Dwarves are different than Dark Iron Dwarves in culture, aesthetics, and personality. Wildhammer Dwarves would be unique as well if they were fully playable (and no, I don’t count Bronzebeards LARPing as them with a few tattoos and such).
-Kul Tirans are Humans, but the playable variant of them look and act different than regular humans. They’re both humans in the grand scheme of things, but there is a noticeable difference.
I could go on, but I feel like it bears repeating some of these points. If we can have multiple of those races and have them all stand out, why would reptilian races be excluded? Especially since dragon, snake, and lizard races would all have their own differences in culture, personality, gameplay mechanics, and so on.
It’s why I still see both Sethrak and Saurok having chances of becoming playable and how Dracthyr, neat as they are, should not be treated as the definitive reptilian race, resulting in never adding other playable reptilian races. They all add in their own variety to a game that has lacked playable reptilian races until Dragonflight got announced and I’m sure they would garner some excitement if announced as playable.
As I said, I could go on in greater detail, but I think it’d be yet another potential thesis paper I could write. Regardless, I look forward to the Dracthyr and I still hope to see some more reptiles on that character creation screen!