They're teeny though @Mummytonicekids, so they just go in with other things.
I think your point applies more to reusable nappies, which we also use with ours, but not full time. I do think it's six of one, half a dozen of the other with them tbh. Especially where I live, as landfill doesn't actually go to landfill, it is incinerated and the energy captured from the incineration powers electricity locally. So, although, obviously, loads of nappies in normal waste isn't great and also being produced etc, I feel like at least they won't lie around, completely like new for hundreds of years.