While I understand your argument that in the interim it is somewhat inflationary because we haven't reached the conclusion of the mining process of 21 mil coins, I think that's sort of a misleading claim. Unlike fiat there are only 21 mil coins to be mined. You glossed over supply but didn't express its importance, the supply is finite, 21 mil and that's it. You did mention the different factors in fiat being inflationary but supply is the most important. I like how you broke down the math though, many don't account for lost coins.
RE: Bitcoin goes into deflation on this date.