If making payments in crypto back to FIAT was free it would be more popular. For me it’s mostly useless since the fee to spend crypto is more than the (often free) fee for using my credit card.
New needs to be better and cheaper to be picked up.
In my experience it works extremely well for everything online and digital content. The instance I’m on? 100% crowd funded with microdonations and the hoster directly accepts it without conversion back to fiat. I pay my email and VPN also like this, and on mullvad you even get a 10% discount.
But yes, for everything physical it’s a long way ahead to become widely accepted.
There’s attempts at having payments with 0 fees, that is, if you don’t involve exchanges or payment service providers, who obviously charge a fee for fiat conversion.
Using Nano you have 0 fees for the transaction and ideally as little as 0.25% fee at an exchange for fiat conversion.
It’s not only without fees, it’s very fast (ideallly sub-second confirmation) and eco-friendly (requiring no special hardware, because there is no mining and using very little energy overall).
What’s lacking is places where you can actually pay for things with Nano, but that’s the classic chicken and egg problem.