No ceramic burr grinders make comparable coffee to steel burrs. They’re all worse. Enjoy your steel burrs and don’t overthink it. Even “worn out” I bet they will taste better than ceramic burrs.
Can you explain why? I don’t know enough about coffee grinders to work out how there could be any difference in the end product.
I'm guessing because ceramics are hard, but not as hard as steel, so they're less precise as grinders.
Thing is, no grinder can produce perfectly-sized grounds 100% of the time. Due to randomness in how the beans break, there will always be pieces smaller than the desired size. (Probably larger pieces sneak through, too.)
Grinders all produce a distribution, it's just that burr grinders tend to have a tighter distribution than cheap spice grinders. I'd guess that ceramic burr grinders have ever-so-slightly more give than steel, and will let through slightly more undesired grounds as a result.
But it's probably a pretty minor effect.