I don't have any data points, but my own social circle, of which the majority uses Binance to buy crypto and uses Binance P2P to sell it to ARS (Peso). And since the transfer will be reflected on your bank balance as some regular person sending you money locally, it's not taxed either. The whole process of buying stablecoins USDC or Tether to it being sold to ARS and actually landing on my local bank account takes about 5 min maybe, which is really nice as well - Western Union and Xoom take up to 3 days or so on average.

Most people have used Western Union / Xoom here to get local money, but those have quick limits here, and the government is making it harder and harder to do that, by often prompting to explain your income, then pay taxes on that income, often resulting in double taxation for people.

Most of the things in Argentina are still in Pesos (pubs, restaurants, grocery stores, etc), except for the real estate market of which about half the rental listings ask payment in USD, and if you want to buy a car then half the listings of those are also in USD. Lots of local jobs also pay in USD, so I can definitely see how ARS might at some point be devalued and everything going over to USD, but for now for most day-to-day things you still need ARS.

I'm by no means saying that crypto is the future or even a great solution, but for the current situation here it is quite convenient and better than any alternative.

Edit: To add, if there is one indication of crypto use there, it's that the local Apple Pay equivalent "Mercado Pago", which is available in most shops and restaurants here, has announced that they will add the ability to pay with crypto balance to their app, so I guess there are enough people to warrant that, at the very least.