Why is glicko->dan/kyu non-linear?

[Pimenta]

I’d say that intuitively it makes sense: the ladder becomes steeper the higher you rise in it. Incremental gains become harder and harder. As in all competitive endeavours based on individual skill, there is one person (or a handful) at the top, more so at very strong/expert level, a ton at intermediate/amateur level, etc.
Does this make sense to you?

[Eugene]

@flovo

One additional stone changes the probability to win depending on the players strength.
A Dan can make more use of the additional stones than a DDK. For DDK an additional stone is more or less an additional stone the opponent captures eventually later. For a Dan the whole game will more or less evolve around the additional stones.

I found this answer to be compelling and intuitive. This explains why the ladder is steeper as you go up. It’s because the rungs of the ladders are each a stone apart, and your opponents can do more with that one stone on each step.

Thanks all!