Honestly, I would wage most serious attempts to create a 2024 setting would end up with something akin to Eberron demographics (plus or minus for the species shifts) regardless.
Oh, quite possibly. I haven't really thought about it that much, so, it's entirely possible. To be honest, I couldn't tell you anything about Eberron, it's completely passed me by. So, I'll take your word for it.
But, a 2024 setting, just like Eberron, would actually make sense. The idea that settings are built system agnostic is a point I strongly disagree with. Every single thing about Greyhawk is DIRECTLY taken straight from the mechanics. The mechanics defined the setting to such a huge degree. Same as Forgotten Realms. Settings are very, very much not system agnostic.
Heck, look at all the hoops they had to jump through to bring Dragonlance into 5e. Practically had to rewrite every single element of the setting from the ground up. Clerics from races other than humans??? You never saw that in Dragonlance because the rules didn't permit it. Magic Users that weren't humans or elves? Impossible. A Dwarven wizard in the Tower of High Sorcery?
They took Dragonlance canon out behind the barn and put a gun in its ear.
So tell me again how mechanics don't form settings. Or, maybe you could explain to me why the Circle of Eight are all human. Name three dwarven archmages in the Greyhawk boxed set. Take a look at all the hoops they had to jump through to make a Conan setting for D&D. They had to break rules all over the place. Name me three elven High Priests from the Greybox set for Forgotten Realms.
Settings in D&D have always been defined by mechanics.