It'll "sell" just fine. All it takes is Asmon, Cohh, or some other boomer influencer to play it for 48 hours while their chat spams copypasta about how it's "bringing MMOs back." Box sales will spike, the subreddit/Discord will declare victory, and then everyone will quietly log off once they realize half the "hardcore challenge" is waiting for mana to regen and corpse-running naked through fog.
That's the dirty secret of these nostalgia-driven projects. They can buy hype, but they can't buy staying power. You'll get your dopamine hit of "look how immersive this is!" until the third night of walking thirty minutes back to camp because your group wiped in a tunnel. Then reality sets in: it's not the game that's hard, it's the patience required to tolerate it.