That was one of the questions that was open for me. The idea is, the "mining" never truly stops, but instead reduces to a stable value of 0.3 XMR per . This prevailing understanding is that this is a negligible factor because it is linear in nature, so it cannot by itself produce a x% kind of increase that compares to inflationary numbers. (It won't increase with increasing supply.)

I think this is actually an interesting observation, because if you think about it .. if XMR would run (very) low, the impact would be high, but with healthy numbers, it wouldn't contribute significantly. Unless I make a mistake in my reasoning, this means it is too weak to produce inflation, but does guarantee that you can never quite run out.

Got this from one of the vids people recommended in my question here.