I don't know.

I prefer to pay in Bitcoin for things where the vendor doesn't need my personal details (eg VPN, Nostr services & general Bitcoin stuff).

I think another incremental shift in the purchasing power of Bitcoin will shift people's spending habits. When Bitcoin 3-4Xs in purchasing power, many will stop fiat mining & spending Bitcoin will feel less painful. 

I've largely stopped fiat mining. Whether I spend in fiat or sats makes little difference to me. I generally don't like spending much of anything right now though.