I love it, but running it at least somewhat close to how it's intended by either WotC or Mr. Baker requires pulling from a lot of tropes that may have been familiar to 30something gen Xers in the early 2000s, but with another 20 years of development of media and culture I feel its inspirations have been left behind.
New, young 5e players would be excited by a world that blends magic and technology... and they're expecting steampunk "No!" everyone shouts. "Eberron is not steampunk! Leave that at the door!" That already scares some people off from the concept; they like the netflix show Arcane, for instance, and no one gets mad at them if they call it "Steampunk".
And then you might go on about the pulp inspiration of Eberron; and it is pulp and pulp is great, and pulp is also an inspiration for "generic" D&D... but when was the last time anything "pulp inspired" blew up in pop culture? There was a revival in the mid 2000s with stuff like Sin City, around the same time Eberron was being worked on by men of that same generation, but certainly Frank Miller's The Spirit, Jason Momoa's Conan and Disney's John Carter of Mars bombing harder than Hiroshima hammered the nails in pulp's coffin.
And then the thing I love about Eberron, how it takes D&D "magic by way of mechanics" to their logical conclusion and integrates things like monster biology or spell slots into the economy or culture of nations, lots of players feel like you'd need multiple advanced degrees to really grok that kind of stuff. They want to kill harpies and loot their nests, not consider how a medusa petrifying a herd of cattle can undercut the stone quarry industry.
Again, I love it, and maybe I just suck at getting newer younger players interested in the setting, but basically no one I know who started playing after 3.5e (which means they tend to be geriatric millennials at the youngest) seems to have any affinity for the cultural elements that make it unique.