Maybe in 10 years from now literally every store has the infrastructure to facilitate quick and easy cryptocurrency transactions. I remember the times when debit and credit cards were a quite new thing and you couldn't pay with card everywhere. Nowadays it is the pervasive standard. I think the same will happen with cryptocurrencies and the required infrastructure.
However, also 10 years from now, digital fiat payment will be more fast and convenient. It's already improved honestly and that's what people want.
Not all employees don't like the idea of receiving crypto as salary even they are aware of the good future on it. Maybe because the opportunity to use it everywhere is still far from happening. The majority of regular employees spend their salary right away so no difference at all if they will be paid in crypto as they will convert it to fiat quickly.
Those who will accept crypto as salary are those who already lurk in the crypto-world for a long time as they more understand the market volatility.