You seem confused. The claim has never been that the paradigm will shift when all bitcoins have been mined. When all bitcoins are mined BTC will be even more deflationary and miners won’t get rewards from mining. But that has nothing to do with bitcoin being useful for society. And it should be pretty obvious that a deflationary currency is a terrible currency. If it is actually useful as a currency in 2140 it is also way more likely that it will be forked to postpone that deadline, but that’s beside the point.

We are 15y in and there is still no trace of a meaningful use case outside of the ones I mentioned. I don’t think it’s a failure of bitcoin itself (it’s a neat proof of concept), I see it more as a complete delusion of people pushing cryptocurrencies