Think it is a bootstrapping problem on clearnet. Not many people ask to pay with Monero, so not many merchant implement it. Not many merchant accept, so fewer people have it. https://monerica.com/ maintains a list of some places to spend Monero.

The supply is not capped, it increases linearly. Yes, the inflation as a percent goes toward zero. And if the assumption that similar amount of coins is lost is correct, I guess the effect could be no inflation. This is looking at Monero in isolation. With highly inflationary currencies being the norm, prices in Monero might deflate.

Are you a proponent of inflation as a percent of total supply being linear? Or exponential? BTW insulting people in every post does not strengthen your arguments.

As your link mention, Monero has a tail emission of 0.6 xmr every block. So it is inflationary, but in a predictable fashion. In around 120 years the Monero supply should be doubled. Assuming no changes to emissions that is.