I wonder about this - I've got a few 1Zpresso grinders - they're rated for 100-200kg of coffee, and napkin math says my most-used one has probably done about 70kg to date. At grinder prices and my age though, not sure I'd ever come out ahead with BIFL burrs though.
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.